• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

OutdoorCrunch

  • BASICS
  • PRO TIPS
  • GEAR
    • JACKETS
      • INSULATED JACKETS
        • DOWN JACKETS
        • SYNTHETIC INSULATED JACKETS
      • SHELL JACKETS
        • HARDSHELL JACKETS
        • SOFTSHELL JACKETS
      • SKI JACKETS
      • PARKAS
      • RAIN JACKETS
      • WIND JACKETS
      • FLEECE JACKETS
    • BACKPACKS
    • COOKING
      • BACKPACKING STOVES
      • COOKWARE
    • FOOTWEAR
  • MISCELLANEOUS
  • ABOUT
    • ABOUT ME
    • CONTACT
  • PRIVACY POLICY
Home / Gear / Jackets / Insulated Jackets / Synthetic Insulated Jackets

Arc’teryx Proton LT vs Atom LT

Last updated: May 12, 2023 by Canberk Koksal

  • This article is revised after Arc'teryx FW23 update. 
  • Our community is live: https://deadbird.outdoorcrunch.com/
  • Don't miss out on REI's current sale - shop now and save on all your outdoor gear needs!
    • https://www.rei.com/h/deals

In FW23, women's Proton and Atom lines have undergone a naming scheme change. 

The suffix "LT" is removed and the suffix "AR" is changed to "Heavyweight". The change, however, is limited to the names only, with the products remaining identical. 

Naming scheme of men's counterparts also remain the same. 

The consensus when it comes to Proton vs Atom is that Proton LT is a little bit warmer than the Atom LT, owing to its loftier insulation (80 vs 60 gsm Coreloft). It's also a bit more durable and weather resistant. Atom LT, on the other hand, brings side fleece panels to the table, which makes it a little bit more breathable than the Proton LT in return. 

Keep in mind that these products are much more similar than they're different. Don't be surprised if you don't recognize any of these differences in practice. 

Links:

  • https://arcteryx.com/us/en/shop/mens/proton-lt-hoody
  • https://arcteryx.com/us/en/shop/mens/atom-lt-hoody
  • https://arcteryx.com/us/en/shop/womens/proton-hoody
  • https://arcteryx.com/us/en/shop/womens/atom-hoody
  • Arc'teryx Jacket Finder: https://arcteryx.com/us/en/shop/jacket-finder/

Much lighter configurations of these jackets such as the Proton FL (Men's - Women's), Atom SL (Men's - Women's) and Proton Hybrid Hoody (Men's - Women's) and the heavier configuration Atom AR (Men's - Women's) have not been included in this article since they have different design intentions and best uses. 

Raw NameArc'teryx Proton LTArc'teryx Atom LT
NameArc'teryx Proton LT (Men's - Women's)Arc'teryx Atom LT (Men's - Women's)
ImageArcArc
Temp (°F / °C)37/343/6
Breathability7/108/10
Weather Resistance7/106/10
Durability9/107/10
Packability5/105/10
Best pick forHigh output activities.
ReviewReviewReview
Pit venting?NoYes, mesh
Stuffs into itself?NoNo
Two way zipper?NoNo
Size Chart[Men's / Women's][Men's / Women's]
TypeSyntheticSynthetic
Fill PowerN/AN/A
Fill Weight (grams)N/AN/A
FP x FWN/AN/A
Synthetic Insulator (SI)Coreloft CompactCoreloft Continuous
SI Amount80 g/m2 + 60 g/m260 g/m²
Face FabricFortius Air 2020D Tyono
ActivityClimbingAll Round
FitTrimTrim
Weight375 g / 13.2 oz375 g / 13.2 oz
Length (CB)75 cm / 29.4 in74 cm / 29.1 in
arc-mens-urlhttps://www.arcteryx.com/us/en/shop/mens/proton-lt-hoodyhttps://www.arcteryx.com/us/en/shop/mens/atom-lt-hoody
arc-womens-urlhttps://www.arcteryx.com/us/en/shop/womens/proton-hoodyhttps://www.arcteryx.com/us/en/shop/womens/atom-hoody
pat-mens-url
pat-womens-url
rei-mens-urlhttps://www.rei.com/product/154873https://www.rei.com/product/175332
rei-womens-urlhttps://www.rei.com/product/152547https://www.rei.com/product/174720
backcountry-mens-url
backcountry-womens-url
amazon-mens-urlhttps://www.amazon.com/Arcteryx-Proton-Jacket-Glade-Large/dp/B08BJFXW1Jhttps://www.amazon.com/Arcteryx-24109-Atom-LT-Jacket/dp/B08BJHB631
amazon-womens-urlhttps://www.amazon.com/Arcteryx-Lightweight-Breathable-synthetically-Insulated/dp/B0973FDVWVhttps://www.amazon.com/Arcteryx-24112-Atom-LT-Jacket/dp/B08BJFFFB4
image-urlhttps://images.arcteryx.com/F22/1350x1710/Proton-LT-Hoody-Distortion.jpghttps://images.arcteryx.com/F22/1350x1710/Atom-LT-Hoody-Forage.jpg
 

If you're interested in reading more about them, too; click through: 

  • https://outdoorcrunch.com/arcteryx-proton-hybrid-hoody-review/
  • https://outdoorcrunch.com/atom-ar-vs-atom-lt/
  • https://outdoorcrunch.com/arcteryx-atom-lt-vs-sl/
  • https://outdoorcrunch.com/atom-sl-vs-proton-fl/

  • Arc'teryx Jackets: Temperature Ratings

NameEst. Temp (F/C)ReviewPit venting?Stuffs into itself?Two way zipper?TypeFill PowerFill Weight (grams)Fill Volume (FP x FW)Synthetic Insulator (SI)SI AmountFace FabricActivityFitWeightLength (CB)
Arc'teryx Alpha (Men's - Women's)-18/-28ReviewNoYesYesDown850296251,600Coreloft90 g/m²N30r 2L GoreTex InfiniumClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 in
Feathered Friends Khumbu-17/-27NoYesNoDown900378340,200Primaloft Gold200 gPretex Shield XTAll RoundRegular960 g / 2 lb 2 oz?
Arc'teryx Ceres SV (Men's - Women's)-15/-26ReviewNoYesYesDown850240204,000Coreloft?Arato 30All RoundRegular880 g / 1 lb 15 oz86 cm / 34 in
Mountain Equipment K7 (Men's)-13/-25NoYesYesDown800300240,000N/AN/A30D DriliteAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 in
Rab Positron Pro (Men's)-13/-25NoYesYesDown800300240,000N/AN/A40D Pertex Quantum ProAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 in
Arc'teryx Therme SV (Men's)-11/-24ReviewNoNoYesParka750211158,250Coreloft60 g/m²2L Gore-TexAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 in
Patagonia Grade VII (Men's)-11/-24NoNoYesDown800335268,000N/AN/A1.2 oz 15 & 20D Perfex QuantumAround TownRegular743 g / 1 lb 10.1 oz83 cm / 32.5 in
Arc'teryx Firebee AR (Men's - Women's)-10/-23ReviewNoYesYesDown800225180,000N/AN/AArato 7 & 10All RoundRegular680 g / 1 lb 8 oz79 cm / 31 in
Mountain Equipment Exo (Men's)-10/-23NoYesYesDown800265212,000N/AN/ANylonAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 in
Arc'teryx Thorsen (Men's)-7/-22ReviewNoNoYesParka750192144,000Coreloft60 g/m²90D 2L Gore-TexAround TownRegular1.1 kg / 2 lb 5.4 oz91 cm / 36 in
Patagonia Frozen Range (Men's - Women's)-6/-21ReviewNoNoNoParka700268187,600N/AN/A4 oz 75-denier polyesterAround TownRegular1.253 kg / 2 lb 12.2 oz84 cm / 33 in
Mountain Equipment Li. Ec. (Men's - Women's)-5/-20NoNoYesDown700295206,500N/AN/A50D DriliteAll RoundRegular822 g / 1 lb 13 oz72 cm / 28 in
Arc'teryx Patera Long (Women's)-2/-19NoNoYesParka7507455,500Coreloft60 + 80 g/m²2L Gore-TexAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 in
Rab Neutrino Pro (Men's - Women's)-2/-19NoYesYesDown800212169,600N/AN/A20D Pertex Quantum ProAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 in
Arc'teryx Dually Belay (Men's)0/-18ReviewNoYesYesSyntheticN/AN/AN/AThermaTek92 g/m²30D NylonAround TownRegular705 g / 1 lb 9 oz84 cm / 33 in
Arc'teryx Centrale (Women's)0/-18ReviewNoNoYesParka750157117,750Coreloft60 g/m²N90p NylonAround TownRegular885 g / 1 lb 15.2 oz95 cm / 37.5 in
Arc'teryx Camosun (Men's)0/-18ReviewNoNoNoParka75010578,750Coreloft140 g/m²N150p-X Gore-TexAround TownTrim960 g / 2 lb 1.9 oz80 cm / 31.5 in
Arc'teryx Cerium SV (Men's)0/-18ReviewNoYesNoDown850162137,700Coreloft80 + 140 g/m²Arato 7 & 10All RoundRegular415 g / 14.6 oz69.5 cm / 27.4 in
Arc'teryx Revet (Men's)2/-17NoNoYesParka750?N/AN/A20d nylon/spandex double weaveAround TownRegular755 g / 1 lb 10.6 oz91 cm / 36 in
Arc'teryx Piedmont (Men's)3/-16NoYesYesParka750218163,500N/AN/AArato 10Around TownRegular515 g / 1 lb 2.2 oz82 cm / 32.25 in
Arc'teryx Fission SV (Men's - Women's)3/-16ReviewNoNoYesSyntheticN/AN/AN/ACoreloft Continuous90 + 65 g/m²N80p-X Gore-Tex 2LAll RoundRegular890 g / 1 lb 15.4 oz81 cm / 31.8 in
Arc'teryx Alpha Lightweight (Men's)3/-16NoYesYesDown85011799,450Coreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumClimbingRegular540 g / 1 lb 3 oz?
Outdoor Research Sup. Alp. (Men's - Women's)3/-16NoNoYesDown800182145,600N/AN/A30D Pertex Quantum ProAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 in
Arc'teryx Alessa Long (Women's)3/-16NoNoNoParkaN/AN/AN/ACoreloft80 + 120 g/m²N90p 2L Gore-TexAround TownRegular1.015 kg / 2 lb 3.8 oz123 cm / 48.5 in
Patagonia Tres 3-in-1 (Men's - Women's)3/-16ReviewNoNoNoParka70011882,600N/AN/A5.5 oz polyesterAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 in
Arc'teryx Radsten Parka (Men's)3/-16NoNoNoParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LAround TownRegular745 g / 1 lb 10.3 oz82 cm / 32.25 in
Rab Electron Pro (Men's - Women's)5/-15NoYesYesDown800180144,000N/AN/A20D Pertex Quantum ProAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 in
Arc'teryx Therme Parka (Men's)5/-15ReviewNoNoYesParka75012090,000Coreloft60 + 80 g/m²P75d PolyesterAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 in
Arc'teryx Macai (Men's)5/-15ReviewYes, zipsNoNoDown7506951,750Coreloft Compact60 + 100 g/m²N40p-X 3L Gore-TexSki/SnowboardRegular1 kg / 2 lb 4 oz76 cm / 30 in
Arc'teryx Nuclei SV (Men's)5/-15ReviewNoYesYesSyntheticN/AN/AN/ACoreloft Continuous180 g/m2 + 90 g/m2Arato 15ClimbingRegular600 g / 1 lb 5.2 oz81 cm / 31.8 in
Patagonia DAS Parka (Men's)5/-15NoYesYesParkaN/AN/AN/APrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProAround TownRegular555 g / 1lb 3.6 oz84 cm / 33 in
Arc'teryx Patera (Women's)5/-15ReviewNoNoYesParka7505843,500Coreloft60 + 80 g/m²2L Gore-TexAround TownTrim867 g / 1 lb 14.6 oz93 cm / 37 in
Black Diamond Access Down (Men's - Women's)7/-14NoYesYesDown700155108,500N/AN/A30D ripstop nylonAll RoundRegular442 g / 15.6 oz76 cm / 29.75 in
Arc'teryx Kappa (Men's)7/-14ReviewNoNoYesSyntheticN/AN/AN/ACoreloft Continuous140 g/m²N70p Gore ThermiumAll RoundRegular755 g / 1 lb 10.6 oz80 cm / 31.5 in
Arc'teryx Prema Down Coat (Women's)7/-14NoNoYesParka7509269,000N/AN/ANylonAround TownRegular794 g / 1 lb 12 oz117 cm / 46.1 in
Arc'teryx Radsten Insulated (Men's)7/-14NoNoNoParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LAround TownRegular715 g / 1 lb 9.2 oz73 cm / 28.75 in
Rab Microlight Alpine (Men's - Women's)7/-14NoYesNoDown700153107,100N/AN/A30D Pertex QuantumAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 in
Arc'teryx Thorium (Men's - Women's)7/-14ReviewNoYesYesDown750140105,000Coreloft80 + 140 g/m²Arato 30All RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 in
Feathered Friends Eos8/-13NoYesNoDown90010594,500N/AN/APertex QuantumAll RoundRegular306 g / 10.8 oz?
Arc'teryx Thorium AR (Men's - Women's)8/-13ReviewNoYesNoDown75013097,500Coreloft80 + 140 g/m²Arato 30All RoundRegular490 g / 1 lb 1.3 oz72 cm / 28.3 in
Patagonia Macro Puff (Men's - Women's)8/-13ReviewNoNoNoSyntheticN/AN/AN/APlumaFill135 + 90 g10D Recycled nylon ripstopAll RoundRegular435 g / 15.3 oz79 cm / 31 in
Arc'teryx Macai LT (Men's)8/-13Yes, zipsNoNoDown7504936,750Coreloft Compact60 g/m²N40p-X 3L Gore-TexSki/SnowboardRegular855 g / 1 lb 14.2 oz74 cm / 29.1 in
Arc'teryx Seyla (Women's)8/-13NoNoYesParka7509269,000N/AN/AArato 10Around TownRegular507 g / 1 lb. 1.9 oz.87 cm / 34.4 in
Patagonia Fitz Roy (Men's - Women's)8/-13NoYesNoDown800128102,400N/AN/A20D NylonAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 in
Arc'teryx Koda (Men's)8/-13NoNoNoParkaN/AN/AN/ACoreloft80 + 140 g/m²N80p-X Gore-TexAround TownRegular720 g / 1 lb 9.4 oz75 cm / 29.5 in
Patagonia Vosque 3-in-1 (Women's)10/-12ReviewNoNoNoParkaN/AN/AN/AThermoLite100 g65% nylon, 35% polyesterAround TownRegular1.360 kg / 3 lb90 cm / 35.5 in
Patagonia City Storm Down (Men's - Women's)12/-11NoYesNoParka700191133,700N/AN/A4.2 oz polyesterAll RoundRegular468 g / 16.5 oz91 cm / 36 in
Patagonia Jackson Glacier (Men's - Women's)12/-11ReviewNoNoYesParka70014198,700N/AN/A3.6 oz 50D polyesterAround TownRegular880 g / 1 lb 15 oz79 cm / 31 in
Arc'teryx Sensa (Women's)14/-10NoNoYesParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LAround TownRelaxed785 g / 1 lb 11.7 oz86 cm / 34 in
Patagonia Hi Loft Down (Men's - Women's)14/-10ReviewNoYesNoDown600177106,200N/AN/A1.4 oz 30D polyesterAll RoundRegular540 g / 1 lb 3 oz76 cm / 30 in
REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10NoYesNoDown850120102,000N/AN/APertex mini ripstop nylonAll RoundRegular340 g / 13.75 oz74 cm / 29.25 in
Arc'teryx Beta Insulated Coat (Women's)16/-9ReviewNoNoYesSyntheticN/AN/AN/ACoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexAround TownRegular600 g / 1 lb 5.2 oz?
Arc'teryx Atom AR (Men's - Women's)18/-8ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Continuous120 g/m2 + 80 g/m2 + 60 g/m230D TyonoAll RoundRegular475 g / 1 lb 74 cm / 29.1 in
Patagonia Downdrift (Men's - Women's)18/-8NoNoNoDown600279167,400N/AN/A4.2 oz polyesterAround TownRegular1.014 kg / 2 lb 3.8 oz?
Arc'teryx Magnus (Men's)19/-7NoNoNoParkaN/AN/AN/ACoreloft80 gN60p Gore-Tex 2LAround TownRegular690 g / 1 lb 8.3 oz83 cm / 32.5 in
Arc'teryx Agrium (Men's - Women's)21/-6NoYesNoDown85011799,450N/AN/AAratoAll RoundRegular365 g / 12.9 oz75 cm / 29.5 in
Patagonia AlpLight Down (Men's - Women's)21/-6NoYesNoDown80010080,000N/AN/A0.8 oz 10D polyesterAll RoundSlim270 g / 9.5 oz74 cm / 29 in
Arc'teryx Beta Insulated (Men's - Women's)21/-6ReviewYes, zipsNoYesSyntheticN/AN/AN/ACoreloft Continuous80 g/m²2L 40D Gore-TexAll RoundRegular680 g / 1 lb 8 oz78.5 cm / 31 in
Patagonia Topley (Men's)23/-5NoNoYesDown700172120,400N/AN/A6 oz polyesterAll RoundRegular1.133 kg / 2 lb 8 oz77 cm / 30.5 in
Arc'teryx Alpha IS (Men's)23/-5NoYesYesSyntheticN/AN/AN/ACoreloft Continuous65 g/m²N40p-X 2L Gore-TexClimbingRegular610 g / 1 lb 5.5 oz78 cm / 30.75 in
Rab Xenon 2.0 (Men's - Women's)23/-5NoYesYesSyntheticN/AN/AN/APrimaLoft Silver60 g30D Pertex QuantumAll RoundRegular385 g / 13.6 oz71.5 cm / 28.1 in
Patagonia Down Sweater (Men's - Women's)23/-5ReviewNoYesNoDown800150120,000N/AN/A1.4 oz 20x30D polyesterAll RoundRegular428 g / 15.1 oz67 cm / 26.25 in
Arc'teryx Ralle Parka (Men's)25/-4NoNoYesParkaN/AN/AN/ACoreloft 80 g/m²2L 40D Gore-TexAround TownRegular735 g / 1 lb 9.9 oz?
Patagonia Silent Down (Men's - Women's)26/-3ReviewNoNoNoDown70010976,300N/AN/A2.2 oz polyesterAround TownRegular585 g / 1 lb 4.7 oz74 cm / 29 in
Arc'teryx Therme Insulated (Men's)26/-3ReviewNoNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²2L Gore-TexAround TownRegular960 g / 2 lb 1.9 oz73 cm / 28.75 in
Arc'teryx Cerium (Men's - Women's)26/-3NoYesNoDown85011396,050Coreloft 80 + 100 g/m²Arato 15All RoundTrim335 g / 11.8 oz?
Mountain Hardwear GW/2 (Men's - Women's)28/-2NoYesNoDown8008568,000N/AN/A10D Ripstop NylonAll RoundTrim250 g / 8.8 oz70 cm / 27.5 in
Arc'teryx Cerium LT (Men's - Women's)28/-2ReviewNoYesNoDown85010286,700Coreloft 80 + 100 g/m²Arato 10All RoundTrim305 g / 10.8 oz72 cm / 28.3 in
Arc'teryx Nuclei FL (Men's - Women's)32/0ReviewNoYesNoSyntheticN/AN/AN/ACoreloft Continuous65 g/m²Arato 10rClimbingTrim325 g / 11.5 oz75 cm / 29.5 in
Patagonia DAS Light (Men's - Women's)34/1NoYesYesSyntheticN/AN/AN/APlumaFill65 g0.8-oz 10-denier Pertex Quantum ProClimbingRegular320 g / 11.3 oz77 cm / 30.5 in
Patagonia Micro Puff (Men's - Women's)36/2ReviewNoYesNoSyntheticN/AN/AN/APlumaFill65 gPertex QuantumAll RoundTrim298 g / 10.5 oz75 cm / 29.5 in
Patagonia Isthmus (Men's)36/2NoNoNoParkaN/AN/AN/AThermoGreen60 g4.2 oz polyesterAround TownRegular895 g / 1 lb 15.6 oz70 cm / 27.5 in
Arc'teryx Proton LT (Men's - Women's)37/3ReviewNoNoNoSyntheticN/AN/AN/ACoreloft Compact80 g/m2 + 60 g/m2Fortius Air 20ClimbingTrim375 g / 13.2 oz75 cm / 29.4 in
Patagonia Nano Puff (Men's - Women's)37/3ReviewNoYesNoSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco60 g22D PolyesterAll RoundRegular363 g / 12.8 oz71.5 cm / 28 in
Arc'teryx Norvan SL Ins. (Men's - Women's)39/4NoYesNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²Gore-Tex ShakeDryRunningTrim270 g / 9.5 oz71.5 cm / 28.1 in
Patagonia Nano Air (Men's - Women's)41/5ReviewNoNoNoSyntheticN/AN/AN/AFullRange60 g33D Nylon ripstopAll RoundTrim318 g / 11.2 oz?
Arc'teryx Atom LT (Men's - Women's)43/6ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Continuous60 g/m²20D TyonoAll RoundTrim375 g / 13.2 oz74 cm / 29.1 in
Arc'teryx Cerium SL (Men's - Women's)43/6ReviewNoYesNoDown8505849,300Coreloft 40 + 100 g/m²Arato 7All RoundTrim215 g / 7.6 oz69 cm / 27.2 in
Arc'teryx Proton Hybrid (Men's - Women's)46/8ReviewNoNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²Fortius™ Air 50All RoundTrim365 g / 12.9 oz?
Arc'teryx Proton FL (Men's)48/9ReviewNoNoNoSyntheticN/AN/AN/AOcta Loft94 g/m²Fortius Air 20ClimbingTrim323 g / 11.4 oz77 cm / 30.4 in
Arc'teryx Atom SL (Men's - Women's)52/11ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²20D TyonoAll RoundTrim245 g / 8.6 oz72 cm / 28.3 in
REI Stormhenge Hybrid (Men's - Women's)TestingYes, zipsNoNoDown850?N/AN/A40D + 80DAll RoundRegular900 g / 1 lb 15.75 oz80 cm / 31.5 in
Arc'teryx Monitor Insulated (Women's)TestingNoNoYesParkaN/AN/AN/ACoreloft80 + 100 g/m²40D 3L Gore-TexAround TownOversized645 g / 1 lb 6.8 oz93 cm / 37 in
Arc'teryx Coelle (Women's)TestingNoNoYesParkaN/AN/AN/ACoreloft80 + 140 g/m²40D 2L Gore-TexAround TownRegular460 g / 1 lb 0.2 oz93 cm / 37 in

View full table at https://outdoorcrunch.com/best-arcteryx-jacket/. 

If you're confused now and don't know which jacket best corresponds to your own needs, then follow the advice given in https://arcteryx.com/us/en/shop/jacket-finder/. 

The temperature ratings in this list are intended to represent the lowest temperatures you can wear each jacket without feeling uncomfortably cold. 

Keep in mind that these are only approximate values, assuming: 

  • worn over a shirt only and no shell over, 
  • during daily use (strolls, power walks etc at most - no high output activities), 
  • with light wind, 
  • and when it's dry out.

These values applicable to your torso only. Your hands, legs and feet are still subject to their own additional insulation.

The best practice is usually to use this table for comparing each jacket to one another, rather than pinpointing their ratings. 

Also, ratings will best respond to males. As most women tend to run colder than men, for women, shifting these ratings a bit is recommended. 

Always opt for the warmer option when in doubt. For jackets with Atom AR level warmth and beyond, recommended is almost always the hooded models. 

  • Also see: Arc'teryx Shells
NameBottom lineActivityReviewBreathabilityWeather Res.DurabilityPackabilityTemp (F/C)Pit zips?Two way zipper?Stuffs into itself?Hood?Face FabricFitWeightLengthMeasurements
Alpha FL (Men's - Women's)Climbing4/105/106/1010/10N/ANoNoYesStormHoodHadron 3L Gore-TexTrim209 g / 7.4 oz76.5 cm / 30 in[Men's / Women's]
Alpha SL (Men's - Women's)Climbing3/104/106/109/10N/ANoNoYesStormHoodN40p 3L Gore-TexTrim326 g / 11.5 oz77.5 cm / 30.5 in[Men's / Women's]
Alpha AR (Men's - Women's)Go-to climbing harshell. ClimbingReview8/107/108/104/10N/AYesNoNoStormHoodN40d & N80d Most Rugged 3L Gore-Tex ProRegular430 g / 15.2 oz79.5 cm / 31.25 in[Men's]
Alpha SV (Men's - Women's)Strongest climbing hardshell. ClimbingReview8/1010/1010/103/10N/AYesNoNoStormHoodN100d Most Rugged 3L Gore-Tex ProRegular510 g / 1 lb 2 oz78 cm / 30.75 in[Men's]
Alpha IS (Men's)Climbing7/105/105/108/1023/-5NoYesYesStormHoodN40p-X 2L Gore-TexRegular610 g / 1 lb 5.5 oz78 cm / 30.75 in
Beta (Men's - Women's)All Round5/105/104/105/10N/ANoNoNoStormHoodN30p-X 3L Gore-TexFitted300 g / 10.6 oz76 cm / 30 in
Beta Long (Men's)All RoundReview5/108/108/103/10N/ANoNoNoStormHoodN80p 3L Gore-TexRegular441 g / 15.6 oz85 cm / 33.5 in
Beta Coat (Women's)All Round7/105/104/105/10N/ANoYesNoStormHood3L Gore-TexRegular320 g / 11.3 oz?[Men's / Women's]
Beta LT Hadron (Men's - Women's)All Round5/105/104/105/10N/ANoNoNoStormHoodHadron 3L Gore-TexFitted255g / 9 oz76 cm / 30 in
Beta LT (Men's - Women's)Beta AR alternative. All RoundReview8/107/108/105/10N/AYesNoNoStormHoodN40d 3L Gore-TexFitted395 g / 13.9 oz76 cm / 30 in
Beta Insulated (Men's - Women's)Best insulated shell. All Round10/104/104/102/1021/-6YesYesNoStormHoodN40d 2L Gore-TexRegular680 g / 1 lb 8 oz78.5 cm / 31 in[Men's / Women's]
Beta Insulated Coat (Women's)Beta Insulated alternative. All Round7/104/104/102/1016/-9NoYesNoStormHoodN40d 2L Gore-TexRegular600 g / 1 lb 5.2 oz?[Men's / Women's]
Beta AR (Men's - Women's)Go-to all-round harshell. All RoundReview8/108/108/104/10N/AYesNoNoDropHoodN40r-X & N80p-X Most Rugged 3L Gore-Tex ProRegular460 g / 1 lb 76 cm / 30 in
Beta SV (Men's - Women's)Strongest all-round harshell. All RoundReview8/1010/109/103/10N/AYesNoNoStormHoodN80p-X Most Rugged 3L Gore-Tex ProRegular495 g / 1 lb 1.5 oz79 cm / 31 in[Men's / Women's]
Alpine Guide (Men's - Women's)All Round8/1010/109/103/10N/AYesNoNoStormHoodN80d-X Most Rugged 3L Gore-Tex ProRegular480g / 1 lb 0.9 oz?[Men's]
Gamma SL (Men's - Women's)A trimmer Gamma LT. All RoundReview7/102/106/105/10N/ANoNoNoStormHoodFortius 1.0Trim310 g / 10.9 oz74 cm / 29.1 in[Men's / Women's]
Gamma LT (Men's)A fleeceless, trimmer Gamma MX. All RoundReview7/103/107/103/10N/ANoNoNoStormHoodWee BurlyRegular545 g / 1 lb 3.2 oz76 cm / 30 in[Men's / Women's]
Gamma MX (Men's - Women's)A softshell with a fleece. All RoundReview6/104/108/103/10N/ANoNoNoStormHoodFortius 2.0Regular555 g / 1 lb 3.6 oz74 cm / 29.1 in[Men's / Women's]
Rush (Men's - Women's)Go-to ski jacket. SkiingReview8/109/109/103/10N/AYesNoNoStormHoodN80p-X & N100p-X 3L Most Rugged Gore-Tex ProRegular590 g / 1 lb 4.8 oz79.5 cm / 31.25 in[Men's]
Sabre (Men's)Alternative to Rush. Skiing8/108/108/102/10N/AYesNoNoStormHoodN80p-X 3L Gore-TexRegular705 g / 1 lb 8.9 oz79 cm / 31 in
Sentinel (Women's)Skiing8/108/108/102/10N/AYesNoNoStormHoodN70p 3L Gore-TexRegular370 g / 13.1 oz?
Macai (Men's)Go-to insulated ski jacket. SkiingReview10/108/109/101/105/-15YesNoNoDropHoodN40p-X 3L Gore-TexRegular1 kg / 2 lb 3.3 oz75 cm / 29.5 in
Macai LT (Men's)A lighter Macai with StormHood. Skiing8/107/108/101/108/-13YesNoNoStormHoodN40p-X 3L Gore-TexRegular855 g / 1 lb 14.2 oz?[Men's]
Andessa (Women's)Go-to insulated ski jacket. Skiing10/10TestingTesting1/108/-13YesNoNoDropHoodN40d 3L Gore-TexTrim869 g / 1 lb 14.7 oz?
Andessa Shell (Women's)Non-insulated Andessa. Skiing5/10TestingTesting3/10N/ANoNoNoDropHoodN70p 3L Gore-TexTrim560 g / 1 lb 3.8 oz?
Theriss Down (Women's)Skiing8/106/107/102/10TestingYesNoNoStormHoodN80p 2L Gore-TexRegular709 g / 1 lb 9 oz?
Rush IS (Women's)An insulated Rush. Skiing5/10TestingTesting9/1016/-9NoNoYesStormHoodGore-Tex InfiniumRegular515 g / 1 lb 2.2 oz?
Sentinel IS (Women's)SkiingTestingTestingTestingTesting21/-6YesNoNoStormHoodN80p 2L Gore-TexRegular600 g / 1 lb 5.2 oz?[Women's]
Ski Guide (Men's - Women's)SkiingTestingTestingTestingTestingN/AYesNoNoDropHoodN80d Most Rugged 3L Gore-Tex ProRegular570 g / 1 lb 4.1 oz?
Micon HeatherSkiingTestingTestingTestingTestingN/AYesNoNoStormHoodNP100-d 3L Gore-TexRegular685 g / 1 lb 8.2 oz83 cm / 32.5 in[Men's]
Micon (Men's)SkiingTestingTestingTestingTestingN/AYesNoNoStormHoodN80p 3L Gore-TexRegular685 g / 1 lb 8.2 oz83 cm / 32.5 in[Men's]
Cassiar (Men's)SkiingReview8/107/108/103/10N/AYesNoNoDropHoodN70p 3L Gore-TexTrim820 g / 1 lb 12.9 oz74.5 cm / 29.3 in[Women's]
Cassiar LT (Men's)SkiingReview6/106/106/105/10N/AYesNoNoDropHoodN70p 3L Gore-TexTrim605 g / 1 lb 5.3 oz75 cm / 29.5 in[Women's]
Ravenna (Women's)SkiingReview8/107/108/103/10N/AYesNoNoDropHoodN70s-4 3L Gore-TexTrim725 g / 1 lb 9.6 oz69.5 cm / 27.4 in[Men's]
Ravenna LT (Women's)SkiingReview6/106/106/105/10N/AYesNoNoDropHoodN70p 3L Gore-TexTrim540 g / 1 lb 3 oz69 cm / 27.2 in[Men's]
Procline (Men's)SkiingTestingTestingTestingTestingN/AYesNoNoStormHoodN70p Gore-Tex InfiniumTrim720 g / 1 lb 9.4 oz76 cm / 30 in[Women's]
Shashka Stretch (Women's)SkiingTestingTestingTestingTestingN/AYesNoNoStormHoodN70p Gore-Tex InfiniumTrim670 g / 1 lb 7.6 oz71 cm / 28 in[Women's]
Sabre AR (Men's)SkiingReview7/108/107/107/10N/AYesNoNoStormHoodN70p 3L Gore-TexRegular700 g / 1 lb 8.7 oz79 cm / 31 in[Men's]
Sentinel AR (Women's)SkiingReview7/108/107/107/10N/AYesNoNoStormHoodN70p 3L Gore-TexRegular590 g / 1 lb 4.8 oz72.5 cm / 28.5 in[Women's]
Sabre LT (Men's)SkiingReview7/108/107/108/10N/AYesNoNoStormHoodN80p 3L Gore-TexRegular660 g / 1 lb 7.3 oz83 cm / 32.5 in
Sentinel LT (Women's)SkiingReview7/108/107/108/10N/AYesNoNoStormHoodN80p 3L Gore-TexRegular565 g / 1 lb 3.9 oz73.5 cm / 29 in
Incendia (Women's)SkiingReview8/109/109/103/10N/AYesNoNoStormHoodNP100d 3L Gore-TexTrim610 g / 1 lb 5.5 oz79 cm / 31 in[Women's]
Indencia ISSkiingTestingTestingTestingTestingTestingYesNoNoStormHoodN80p 2L Gore-TexRegular?78 cm / 30.75 in[Men's / Women's]
Norvan LT (Men's - Women's)Go-to running jacket. Running5/105/108/106/10N/ANoNoNoStandardN13p 3L Gore-TexFitted190 g / 6.7 oz?[Women's]
Squamish (Men's - Women's)Trimmer, lighter, packable running jacket. RunningReview5/104/107/109/10N/ANoNoYesStormHood30D TyonoTrim140 g / 4.9 oz77.5 cm / 30.5 in[Women's]
Norvan SL Ins. (Women's)RunningTestingTestingTestingTesting39/4NoNoYesStandardGore-Tex ShakeDryTrim270 g / 9.5 oz71.5 cm / 28.1 in[Women's]
Cita (Women's)RunningReview7/104/105/1010/10N/ANoNoYesStandardLuminTrim120 g / 4.2 oz67.5 cm / 26.5 in[Men's]
Cita SL (Women's)RunningReview7/104/104/1010/10N/AYesNoYesStandardPermeair 20Trim65 g / 2.3 oz61.5 cm / 24.2 in[Men's]
Incendo (Men's)RunningReview7/104/105/1010/10N/ANoNoYesStandardLuminTrim125 g / 4.4 oz?
Incendo SL (Men's)RunningReview7/104/104/1010/10N/ANoNoYesStandardPermair 20 & CanimTrim80 g / 2.8 oz73 cm / 28.75 in[Men's / Women's]
Incendo AirshellRunningTestingTestingTestingTestingN/ANoNoYesStandard????[Men's]
Norvan SL (Men's - Women's)RunningReview7/106/108/108/10N/ANoNoYesStandardGore-Tex InfiniumTrim120 g / 4.2 oz77 cm / 30.4 in[Women's]
Trino SL (Men's)RunningReview8/105/107/106/10N/ANoNoNoStandardGore-Tex InfiniumTrim340 g / 12 oz74 cm / 29.1 in[Men's / Women's]
Trino SL Anorak (Women's)RunningReview8/107/108/107/10N/ANoNoNoStandardGore-Tex InfiniumTrim290 g / 10.2 oz65 cm / 25.5 in[Men's / Women's]
Nodin (Men's - Women's)Running8/105/105/1010/10N/ANoNoYesStandard20D TyonoTrim155 g / 5.5 oz75 cm / 29.5 in[Men's / Women's]
Solano (Men's - Women's)Around TownReviewTestingTestingTestingTestingN/ANoNoNoStandardGore-Tex InfiniumRelaxed355 g / 12.5 oz72 cm / 28.3 in
Venda Anorak (Women's)Around TownTestingTestingTestingTestingN/ANoNoNoStandardGore-TexRelaxed255 g / 9 oz75.5 cm / 29.7 in
Zeta FL (Men's - Women's)Hiking4/106/104/106/10N/ANoNoNoStormHoodN20r 2L Gore-TexTrim221 g / 7.8 oz76 cm / 30 in[Men's / Women's]
Zeta SL (Men's - Women's)HikingReview3/105/104/105/10N/ANoNoNoStormHood2L Gore-TexTrim310 g / 10.9 oz77.8 cm / 30.6 in[Men's]
Zeta LT (Men's - Women's)Hiking5/107/108/105/10N/ANoNoNoStormHoodN40P-X 3L Gore-TexTrim335 g / 11.8 oz78 cm / 30.75 in[Men's]
Zeta AR (Men's)Hiking7/108/107/104/10N/AYesNoNoStormHood3L Gore-TexRegular425 g / 15 oz80 cm / 31.5 in

Best uses of Atom LT and Proton LT are the same: High output activities. 

You can see this in Arc'teryx's Naming Scheme Page as well - for both "Atom" and "Proton".

Arc'teryx Proton LT. 

 

I'd recommend you to base your decision when it comes to Proton LT vs Atom LT primarily on what you're planning to do with the jacket, your view when it comes to side fleece panels, and lastly, your taste when it comes to the looks. 

Because of superior warmth and abrasion resistance capability of Proton LT, I think that it's mostly the better pick for climbing and skiing in not-so-cold-but-still-chilly days.

  • Latest on the blog:
  • 13 Mar 2023: I've been to Pfander and floodplain forests with my Nuclei SV
  • 13 Dec 2022: Arc'teryx Alpha Parka Review: The most impressive jacket of all time
  • 8 Dec 2022: Arc'teryx ReGEAR: OutdoorCrunch exclusive promo code!
  • 7 Nov 2022: 2023 Thorium Hoody is in - as well as the new Thorium Parka (yes, parka)
  • 2 Nov 2022: Beta Insulated Jacket: Pit zips AND two way zipper!
  • 7 October 2022: Proton Hybrid Hoody is live! The ultimate do it all?
  • 5 October 2022: DropHood vs StormHood: Pros/cons and best uses
  • 5 September 2022: Reviewing Arc'teryx Fall Winter 22/23 Gear
  • 5 August 2022: 5 things all Arc'teryx newbies should know
  • #A sidenote here: Arc'teryx's PDF guide to jackets is GOOOLLLLDDDDD. Absolutely check that out too if you're interested in buying one. 
 

Atom LT, on the other hand, is mostly the better choice if you run warm and would love side fleece panels for increased breathability. 

Quick Navigation
Warmth Difference
Weather resistances
Breathability
Packability
Layering
Atom LT 2020 Revision
Proton LT 2019 Revision
Fortius 40 vs 20
Coreloft Continuous vs Compact
Results
Conclusion
Transcript of Customer Service Chat for 2020 Atom LT Updates

Now let's get to the differences between this 2019 version Proton LT and Atom LT.

Warmth

Both Atom LT and Proton LT use Coreloft Compact. But Proton LT is equipped with 80 gsm of it in the body and 60 gsm in the hood, whereas the Atom LT is equipped with 60 gsm everywhere. 

On top of that, side fleece panels of Atom LT make a great job in terms of increasing breathability, but in return, this also causes the heat to escape. 

Proton LT also comes with slightly longer length, which makes a noticeable difference in warmth. 

Weather resistance

The face fabric of Proton LT (Fortius Air 20) is more abrasion & weather resistant than that of Atom's (Tyono 20). The suffix number in the end represents the denier - a unit that is used to determine the thickness of fabric. 

This makes them equals in the big picture, when you get to the nitty gritty, the Fortius Air consists of 16% elastane, whereas Atom LT is equipped with 6% of it. 

Arc'teryx Atom LT. 

I don't have any evidence to prove this, so this isn't scientific, but from what I can see, this more of this fiber tend to make the fabric membrane more durable to inclement weather and abrasion. 

So, compared to Atom LT, having more resistant face fabrics, Proton LT is more suitable to be worn as a standalone piece (without any extra layers) while climbing, ski mountaineering, etc. It can hug a rock all day and capable of resisting foul weather more than the Atom LT. 

Also, both jackets are DWR applied. 

  • What is DWR by the way?

DWR is a coating. 

It's basically sprayed on to the surface of these jackets as a finish. It stands for Durable Water Repellent - which means that water will be repelled under wet conditions instead of soaking into the fabric. 

DWR also decreases dry time. 

It's a good thing these jackets are coated in DWR, but pay attention to the fact that DWR is a coating - meaning that it will wear off over time. 

Which is why you might want to invest in a DWR spray such as this one for after treatment. 

As you see, there's a strong correlation between FP x FW and temperature ratings, but not more than, say, 80%. I explained why this happens here in this post of mine. 

But using more of elastane doesn't only make the fabric more durable... 

...it also makes it more breathable. At the same time. 

Breathability

Sure, Proton LT's membrane is more breathable than the Atom LT's, but how does that play out in practice? 

Well, even though technology has gone a long way in terms of engineering more breathable and durable fabric, more than half of all the breathability we get under a fabric still results from mechanical venting.

Think pit zips, two way front zippers or, in our case, side fleece panels. This makes Atom LT more breathable than the Proton LT. 

Links:

  • https://arcteryx.com/us/en/shop/mens/proton-lt-hoody
  • https://arcteryx.com/us/en/shop/mens/atom-lt-hoody
  • https://arcteryx.com/us/en/shop/womens/proton-hoody
  • https://arcteryx.com/us/en/shop/womens/atom-hoody
  • Arc'teryx Jacket Finder: https://arcteryx.com/us/en/shop/jacket-finder/

Packability

Neither of these jackets have a pocket that they can stuff into. 

Layering

It's very popular to layer Atom LT and Proton LT with Beta LT, AR or SV. 

  • Cheatsheet: Arc'teryx Jackets

Use this chart to compare Arc'teryx shells to one another. 

NameBottom lineActivityReviewBreathabilityWeather Res.DurabilityPackabilityTemp (F/C)Pit zips?Two way zipper?Stuffs into itself?Hood?Face FabricFitWeightLengthMeasurements
Alpha FL (Men's - Women's)Climbing4/105/106/1010/10N/ANoNoYesStormHoodHadron 3L Gore-TexTrim209 g / 7.4 oz76.5 cm / 30 in[Men's / Women's]
Alpha SL (Men's - Women's)Climbing3/104/106/109/10N/ANoNoYesStormHoodN40p 3L Gore-TexTrim326 g / 11.5 oz77.5 cm / 30.5 in[Men's / Women's]
Alpha AR (Men's - Women's)Go-to climbing harshell. ClimbingReview8/107/108/104/10N/AYesNoNoStormHoodN40d & N80d Most Rugged 3L Gore-Tex ProRegular430 g / 15.2 oz79.5 cm / 31.25 in[Men's]
Alpha SV (Men's - Women's)Strongest climbing hardshell. ClimbingReview8/1010/1010/103/10N/AYesNoNoStormHoodN100d Most Rugged 3L Gore-Tex ProRegular510 g / 1 lb 2 oz78 cm / 30.75 in[Men's]
Alpha IS (Men's)Climbing7/105/105/108/1023/-5NoYesYesStormHoodN40p-X 2L Gore-TexRegular610 g / 1 lb 5.5 oz78 cm / 30.75 in
Beta (Men's - Women's)All Round5/105/104/105/10N/ANoNoNoStormHoodN30p-X 3L Gore-TexFitted300 g / 10.6 oz76 cm / 30 in
Beta Long (Men's)All RoundReview5/108/108/103/10N/ANoNoNoStormHoodN80p 3L Gore-TexRegular441 g / 15.6 oz85 cm / 33.5 in
Beta Coat (Women's)All Round7/105/104/105/10N/ANoYesNoStormHood3L Gore-TexRegular320 g / 11.3 oz?[Men's / Women's]
Beta LT Hadron (Men's - Women's)All Round5/105/104/105/10N/ANoNoNoStormHoodHadron 3L Gore-TexFitted255g / 9 oz76 cm / 30 in
Beta LT (Men's - Women's)Beta AR alternative. All RoundReview8/107/108/105/10N/AYesNoNoStormHoodN40d 3L Gore-TexFitted395 g / 13.9 oz76 cm / 30 in
Beta Insulated (Men's - Women's)Best insulated shell. All Round10/104/104/102/1021/-6YesYesNoStormHoodN40d 2L Gore-TexRegular680 g / 1 lb 8 oz78.5 cm / 31 in[Men's / Women's]
Beta Insulated Coat (Women's)Beta Insulated alternative. All Round7/104/104/102/1016/-9NoYesNoStormHoodN40d 2L Gore-TexRegular600 g / 1 lb 5.2 oz?[Men's / Women's]
Beta AR (Men's - Women's)Go-to all-round harshell. All RoundReview8/108/108/104/10N/AYesNoNoDropHoodN40r-X & N80p-X Most Rugged 3L Gore-Tex ProRegular460 g / 1 lb 76 cm / 30 in
Beta SV (Men's - Women's)Strongest all-round harshell. All RoundReview8/1010/109/103/10N/AYesNoNoStormHoodN80p-X Most Rugged 3L Gore-Tex ProRegular495 g / 1 lb 1.5 oz79 cm / 31 in[Men's / Women's]
Alpine Guide (Men's - Women's)All Round8/1010/109/103/10N/AYesNoNoStormHoodN80d-X Most Rugged 3L Gore-Tex ProRegular480g / 1 lb 0.9 oz?[Men's]
Gamma SL (Men's - Women's)A trimmer Gamma LT. All RoundReview7/102/106/105/10N/ANoNoNoStormHoodFortius 1.0Trim310 g / 10.9 oz74 cm / 29.1 in[Men's / Women's]
Gamma LT (Men's)A fleeceless, trimmer Gamma MX. All RoundReview7/103/107/103/10N/ANoNoNoStormHoodWee BurlyRegular545 g / 1 lb 3.2 oz76 cm / 30 in[Men's / Women's]
Gamma MX (Men's - Women's)A softshell with a fleece. All RoundReview6/104/108/103/10N/ANoNoNoStormHoodFortius 2.0Regular555 g / 1 lb 3.6 oz74 cm / 29.1 in[Men's / Women's]
Rush (Men's - Women's)Go-to ski jacket. SkiingReview8/109/109/103/10N/AYesNoNoStormHoodN80p-X & N100p-X 3L Most Rugged Gore-Tex ProRegular590 g / 1 lb 4.8 oz79.5 cm / 31.25 in[Men's]
Sabre (Men's)Alternative to Rush. Skiing8/108/108/102/10N/AYesNoNoStormHoodN80p-X 3L Gore-TexRegular705 g / 1 lb 8.9 oz79 cm / 31 in
Sentinel (Women's)Skiing8/108/108/102/10N/AYesNoNoStormHoodN70p 3L Gore-TexRegular370 g / 13.1 oz?
Macai (Men's)Go-to insulated ski jacket. SkiingReview10/108/109/101/105/-15YesNoNoDropHoodN40p-X 3L Gore-TexRegular1 kg / 2 lb 3.3 oz75 cm / 29.5 in
Macai LT (Men's)A lighter Macai with StormHood. Skiing8/107/108/101/108/-13YesNoNoStormHoodN40p-X 3L Gore-TexRegular855 g / 1 lb 14.2 oz?[Men's]
Andessa (Women's)Go-to insulated ski jacket. Skiing10/10TestingTesting1/108/-13YesNoNoDropHoodN40d 3L Gore-TexTrim869 g / 1 lb 14.7 oz?
Andessa Shell (Women's)Non-insulated Andessa. Skiing5/10TestingTesting3/10N/ANoNoNoDropHoodN70p 3L Gore-TexTrim560 g / 1 lb 3.8 oz?
Theriss Down (Women's)Skiing8/106/107/102/10TestingYesNoNoStormHoodN80p 2L Gore-TexRegular709 g / 1 lb 9 oz?
Rush IS (Women's)An insulated Rush. Skiing5/10TestingTesting9/1016/-9NoNoYesStormHoodGore-Tex InfiniumRegular515 g / 1 lb 2.2 oz?
Sentinel IS (Women's)SkiingTestingTestingTestingTesting21/-6YesNoNoStormHoodN80p 2L Gore-TexRegular600 g / 1 lb 5.2 oz?[Women's]
Ski Guide (Men's - Women's)SkiingTestingTestingTestingTestingN/AYesNoNoDropHoodN80d Most Rugged 3L Gore-Tex ProRegular570 g / 1 lb 4.1 oz?
Micon HeatherSkiingTestingTestingTestingTestingN/AYesNoNoStormHoodNP100-d 3L Gore-TexRegular685 g / 1 lb 8.2 oz83 cm / 32.5 in[Men's]
Micon (Men's)SkiingTestingTestingTestingTestingN/AYesNoNoStormHoodN80p 3L Gore-TexRegular685 g / 1 lb 8.2 oz83 cm / 32.5 in[Men's]
Cassiar (Men's)SkiingReview8/107/108/103/10N/AYesNoNoDropHoodN70p 3L Gore-TexTrim820 g / 1 lb 12.9 oz74.5 cm / 29.3 in[Women's]
Cassiar LT (Men's)SkiingReview6/106/106/105/10N/AYesNoNoDropHoodN70p 3L Gore-TexTrim605 g / 1 lb 5.3 oz75 cm / 29.5 in[Women's]
Ravenna (Women's)SkiingReview8/107/108/103/10N/AYesNoNoDropHoodN70s-4 3L Gore-TexTrim725 g / 1 lb 9.6 oz69.5 cm / 27.4 in[Men's]
Ravenna LT (Women's)SkiingReview6/106/106/105/10N/AYesNoNoDropHoodN70p 3L Gore-TexTrim540 g / 1 lb 3 oz69 cm / 27.2 in[Men's]
Procline (Men's)SkiingTestingTestingTestingTestingN/AYesNoNoStormHoodN70p Gore-Tex InfiniumTrim720 g / 1 lb 9.4 oz76 cm / 30 in[Women's]
Shashka Stretch (Women's)SkiingTestingTestingTestingTestingN/AYesNoNoStormHoodN70p Gore-Tex InfiniumTrim670 g / 1 lb 7.6 oz71 cm / 28 in[Women's]
Sabre AR (Men's)SkiingReview7/108/107/107/10N/AYesNoNoStormHoodN70p 3L Gore-TexRegular700 g / 1 lb 8.7 oz79 cm / 31 in[Men's]
Sentinel AR (Women's)SkiingReview7/108/107/107/10N/AYesNoNoStormHoodN70p 3L Gore-TexRegular590 g / 1 lb 4.8 oz72.5 cm / 28.5 in[Women's]
Sabre LT (Men's)SkiingReview7/108/107/108/10N/AYesNoNoStormHoodN80p 3L Gore-TexRegular660 g / 1 lb 7.3 oz83 cm / 32.5 in
Sentinel LT (Women's)SkiingReview7/108/107/108/10N/AYesNoNoStormHoodN80p 3L Gore-TexRegular565 g / 1 lb 3.9 oz73.5 cm / 29 in
Incendia (Women's)SkiingReview8/109/109/103/10N/AYesNoNoStormHoodNP100d 3L Gore-TexTrim610 g / 1 lb 5.5 oz79 cm / 31 in[Women's]
Indencia ISSkiingTestingTestingTestingTestingTestingYesNoNoStormHoodN80p 2L Gore-TexRegular?78 cm / 30.75 in[Men's / Women's]
Norvan LT (Men's - Women's)Go-to running jacket. Running5/105/108/106/10N/ANoNoNoStandardN13p 3L Gore-TexFitted190 g / 6.7 oz?[Women's]
Squamish (Men's - Women's)Trimmer, lighter, packable running jacket. RunningReview5/104/107/109/10N/ANoNoYesStormHood30D TyonoTrim140 g / 4.9 oz77.5 cm / 30.5 in[Women's]
Norvan SL Ins. (Women's)RunningTestingTestingTestingTesting39/4NoNoYesStandardGore-Tex ShakeDryTrim270 g / 9.5 oz71.5 cm / 28.1 in[Women's]
Cita (Women's)RunningReview7/104/105/1010/10N/ANoNoYesStandardLuminTrim120 g / 4.2 oz67.5 cm / 26.5 in[Men's]
Cita SL (Women's)RunningReview7/104/104/1010/10N/AYesNoYesStandardPermeair 20Trim65 g / 2.3 oz61.5 cm / 24.2 in[Men's]
Incendo (Men's)RunningReview7/104/105/1010/10N/ANoNoYesStandardLuminTrim125 g / 4.4 oz?
Incendo SL (Men's)RunningReview7/104/104/1010/10N/ANoNoYesStandardPermair 20 & CanimTrim80 g / 2.8 oz73 cm / 28.75 in[Men's / Women's]
Incendo AirshellRunningTestingTestingTestingTestingN/ANoNoYesStandard????[Men's]
Norvan SL (Men's - Women's)RunningReview7/106/108/108/10N/ANoNoYesStandardGore-Tex InfiniumTrim120 g / 4.2 oz77 cm / 30.4 in[Women's]
Trino SL (Men's)RunningReview8/105/107/106/10N/ANoNoNoStandardGore-Tex InfiniumTrim340 g / 12 oz74 cm / 29.1 in[Men's / Women's]
Trino SL Anorak (Women's)RunningReview8/107/108/107/10N/ANoNoNoStandardGore-Tex InfiniumTrim290 g / 10.2 oz65 cm / 25.5 in[Men's / Women's]
Nodin (Men's - Women's)Running8/105/105/1010/10N/ANoNoYesStandard20D TyonoTrim155 g / 5.5 oz75 cm / 29.5 in[Men's / Women's]
Solano (Men's - Women's)Around TownReviewTestingTestingTestingTestingN/ANoNoNoStandardGore-Tex InfiniumRelaxed355 g / 12.5 oz72 cm / 28.3 in
Venda Anorak (Women's)Around TownTestingTestingTestingTestingN/ANoNoNoStandardGore-TexRelaxed255 g / 9 oz75.5 cm / 29.7 in
Zeta FL (Men's - Women's)Hiking4/106/104/106/10N/ANoNoNoStormHoodN20r 2L Gore-TexTrim221 g / 7.8 oz76 cm / 30 in[Men's / Women's]
Zeta SL (Men's - Women's)HikingReview3/105/104/105/10N/ANoNoNoStormHood2L Gore-TexTrim310 g / 10.9 oz77.8 cm / 30.6 in[Men's]
Zeta LT (Men's - Women's)Hiking5/107/108/105/10N/ANoNoNoStormHoodN40P-X 3L Gore-TexTrim335 g / 11.8 oz78 cm / 30.75 in[Men's]
Zeta AR (Men's)Hiking7/108/107/104/10N/AYesNoNoStormHood3L Gore-TexRegular425 g / 15 oz80 cm / 31.5 in

More about this chart: https://outdoorcrunch.com/best-arcteryx-shells/ 

If you're confused now and don't know which jacket best corresponds to your own needs, then follow the advice given below: 

  • https://arcteryx.com/us/en/shop/jacket-finder/
  • https://outdoorcrunch.com/best-arcteryx-jacket/

Also see: 

NameEst. Temp (F/C)ReviewPit venting?Stuffs into itself?Two way zipper?TypeFill PowerFill Weight (grams)Fill Volume (FP x FW)Synthetic Insulator (SI)SI AmountFace FabricActivityFitWeightLength (CB)
Arc'teryx Alpha (Men's - Women's)-18/-28ReviewNoYesYesDown850296251,600Coreloft90 g/m²N30r 2L GoreTex InfiniumClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 in
Feathered Friends Khumbu-17/-27NoYesNoDown900378340,200Primaloft Gold200 gPretex Shield XTAll RoundRegular960 g / 2 lb 2 oz?
Arc'teryx Ceres SV (Men's - Women's)-15/-26ReviewNoYesYesDown850240204,000Coreloft?Arato 30All RoundRegular880 g / 1 lb 15 oz86 cm / 34 in
Mountain Equipment K7 (Men's)-13/-25NoYesYesDown800300240,000N/AN/A30D DriliteAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 in
Rab Positron Pro (Men's)-13/-25NoYesYesDown800300240,000N/AN/A40D Pertex Quantum ProAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 in
Arc'teryx Therme SV (Men's)-11/-24ReviewNoNoYesParka750211158,250Coreloft60 g/m²2L Gore-TexAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 in
Patagonia Grade VII (Men's)-11/-24NoNoYesDown800335268,000N/AN/A1.2 oz 15 & 20D Perfex QuantumAround TownRegular743 g / 1 lb 10.1 oz83 cm / 32.5 in
Arc'teryx Firebee AR (Men's - Women's)-10/-23ReviewNoYesYesDown800225180,000N/AN/AArato 7 & 10All RoundRegular680 g / 1 lb 8 oz79 cm / 31 in
Mountain Equipment Exo (Men's)-10/-23NoYesYesDown800265212,000N/AN/ANylonAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 in
Arc'teryx Thorsen (Men's)-7/-22ReviewNoNoYesParka750192144,000Coreloft60 g/m²90D 2L Gore-TexAround TownRegular1.1 kg / 2 lb 5.4 oz91 cm / 36 in
Patagonia Frozen Range (Men's - Women's)-6/-21ReviewNoNoNoParka700268187,600N/AN/A4 oz 75-denier polyesterAround TownRegular1.253 kg / 2 lb 12.2 oz84 cm / 33 in
Mountain Equipment Li. Ec. (Men's - Women's)-5/-20NoNoYesDown700295206,500N/AN/A50D DriliteAll RoundRegular822 g / 1 lb 13 oz72 cm / 28 in
Arc'teryx Patera Long (Women's)-2/-19NoNoYesParka7507455,500Coreloft60 + 80 g/m²2L Gore-TexAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 in
Rab Neutrino Pro (Men's - Women's)-2/-19NoYesYesDown800212169,600N/AN/A20D Pertex Quantum ProAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 in
Arc'teryx Dually Belay (Men's)0/-18ReviewNoYesYesSyntheticN/AN/AN/AThermaTek92 g/m²30D NylonAround TownRegular705 g / 1 lb 9 oz84 cm / 33 in
Arc'teryx Centrale (Women's)0/-18ReviewNoNoYesParka750157117,750Coreloft60 g/m²N90p NylonAround TownRegular885 g / 1 lb 15.2 oz95 cm / 37.5 in
Arc'teryx Camosun (Men's)0/-18ReviewNoNoNoParka75010578,750Coreloft140 g/m²N150p-X Gore-TexAround TownTrim960 g / 2 lb 1.9 oz80 cm / 31.5 in
Arc'teryx Cerium SV (Men's)0/-18ReviewNoYesNoDown850162137,700Coreloft80 + 140 g/m²Arato 7 & 10All RoundRegular415 g / 14.6 oz69.5 cm / 27.4 in
Arc'teryx Revet (Men's)2/-17NoNoYesParka750?N/AN/A20d nylon/spandex double weaveAround TownRegular755 g / 1 lb 10.6 oz91 cm / 36 in
Arc'teryx Piedmont (Men's)3/-16NoYesYesParka750218163,500N/AN/AArato 10Around TownRegular515 g / 1 lb 2.2 oz82 cm / 32.25 in
Arc'teryx Fission SV (Men's - Women's)3/-16ReviewNoNoYesSyntheticN/AN/AN/ACoreloft Continuous90 + 65 g/m²N80p-X Gore-Tex 2LAll RoundRegular890 g / 1 lb 15.4 oz81 cm / 31.8 in
Arc'teryx Alpha Lightweight (Men's)3/-16NoYesYesDown85011799,450Coreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumClimbingRegular540 g / 1 lb 3 oz?
Outdoor Research Sup. Alp. (Men's - Women's)3/-16NoNoYesDown800182145,600N/AN/A30D Pertex Quantum ProAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 in
Arc'teryx Alessa Long (Women's)3/-16NoNoNoParkaN/AN/AN/ACoreloft80 + 120 g/m²N90p 2L Gore-TexAround TownRegular1.015 kg / 2 lb 3.8 oz123 cm / 48.5 in
Patagonia Tres 3-in-1 (Men's - Women's)3/-16ReviewNoNoNoParka70011882,600N/AN/A5.5 oz polyesterAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 in
Arc'teryx Radsten Parka (Men's)3/-16NoNoNoParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LAround TownRegular745 g / 1 lb 10.3 oz82 cm / 32.25 in
Rab Electron Pro (Men's - Women's)5/-15NoYesYesDown800180144,000N/AN/A20D Pertex Quantum ProAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 in
Arc'teryx Therme Parka (Men's)5/-15ReviewNoNoYesParka75012090,000Coreloft60 + 80 g/m²P75d PolyesterAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 in
Arc'teryx Macai (Men's)5/-15ReviewYes, zipsNoNoDown7506951,750Coreloft Compact60 + 100 g/m²N40p-X 3L Gore-TexSki/SnowboardRegular1 kg / 2 lb 4 oz76 cm / 30 in
Arc'teryx Nuclei SV (Men's)5/-15ReviewNoYesYesSyntheticN/AN/AN/ACoreloft Continuous180 g/m2 + 90 g/m2Arato 15ClimbingRegular600 g / 1 lb 5.2 oz81 cm / 31.8 in
Patagonia DAS Parka (Men's)5/-15NoYesYesParkaN/AN/AN/APrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProAround TownRegular555 g / 1lb 3.6 oz84 cm / 33 in
Arc'teryx Patera (Women's)5/-15ReviewNoNoYesParka7505843,500Coreloft60 + 80 g/m²2L Gore-TexAround TownTrim867 g / 1 lb 14.6 oz93 cm / 37 in
Black Diamond Access Down (Men's - Women's)7/-14NoYesYesDown700155108,500N/AN/A30D ripstop nylonAll RoundRegular442 g / 15.6 oz76 cm / 29.75 in
Arc'teryx Kappa (Men's)7/-14ReviewNoNoYesSyntheticN/AN/AN/ACoreloft Continuous140 g/m²N70p Gore ThermiumAll RoundRegular755 g / 1 lb 10.6 oz80 cm / 31.5 in
Arc'teryx Prema Down Coat (Women's)7/-14NoNoYesParka7509269,000N/AN/ANylonAround TownRegular794 g / 1 lb 12 oz117 cm / 46.1 in
Arc'teryx Radsten Insulated (Men's)7/-14NoNoNoParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LAround TownRegular715 g / 1 lb 9.2 oz73 cm / 28.75 in
Rab Microlight Alpine (Men's - Women's)7/-14NoYesNoDown700153107,100N/AN/A30D Pertex QuantumAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 in
Arc'teryx Thorium (Men's - Women's)7/-14ReviewNoYesYesDown750140105,000Coreloft80 + 140 g/m²Arato 30All RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 in
Feathered Friends Eos8/-13NoYesNoDown90010594,500N/AN/APertex QuantumAll RoundRegular306 g / 10.8 oz?
Arc'teryx Thorium AR (Men's - Women's)8/-13ReviewNoYesNoDown75013097,500Coreloft80 + 140 g/m²Arato 30All RoundRegular490 g / 1 lb 1.3 oz72 cm / 28.3 in
Patagonia Macro Puff (Men's - Women's)8/-13ReviewNoNoNoSyntheticN/AN/AN/APlumaFill135 + 90 g10D Recycled nylon ripstopAll RoundRegular435 g / 15.3 oz79 cm / 31 in
Arc'teryx Macai LT (Men's)8/-13Yes, zipsNoNoDown7504936,750Coreloft Compact60 g/m²N40p-X 3L Gore-TexSki/SnowboardRegular855 g / 1 lb 14.2 oz74 cm / 29.1 in
Arc'teryx Seyla (Women's)8/-13NoNoYesParka7509269,000N/AN/AArato 10Around TownRegular507 g / 1 lb. 1.9 oz.87 cm / 34.4 in
Patagonia Fitz Roy (Men's - Women's)8/-13NoYesNoDown800128102,400N/AN/A20D NylonAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 in
Arc'teryx Koda (Men's)8/-13NoNoNoParkaN/AN/AN/ACoreloft80 + 140 g/m²N80p-X Gore-TexAround TownRegular720 g / 1 lb 9.4 oz75 cm / 29.5 in
Patagonia Vosque 3-in-1 (Women's)10/-12ReviewNoNoNoParkaN/AN/AN/AThermoLite100 g65% nylon, 35% polyesterAround TownRegular1.360 kg / 3 lb90 cm / 35.5 in
Patagonia City Storm Down (Men's - Women's)12/-11NoYesNoParka700191133,700N/AN/A4.2 oz polyesterAll RoundRegular468 g / 16.5 oz91 cm / 36 in
Patagonia Jackson Glacier (Men's - Women's)12/-11ReviewNoNoYesParka70014198,700N/AN/A3.6 oz 50D polyesterAround TownRegular880 g / 1 lb 15 oz79 cm / 31 in
Arc'teryx Sensa (Women's)14/-10NoNoYesParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LAround TownRelaxed785 g / 1 lb 11.7 oz86 cm / 34 in
Patagonia Hi Loft Down (Men's - Women's)14/-10ReviewNoYesNoDown600177106,200N/AN/A1.4 oz 30D polyesterAll RoundRegular540 g / 1 lb 3 oz76 cm / 30 in
REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10NoYesNoDown850120102,000N/AN/APertex mini ripstop nylonAll RoundRegular340 g / 13.75 oz74 cm / 29.25 in
Arc'teryx Beta Insulated Coat (Women's)16/-9ReviewNoNoYesSyntheticN/AN/AN/ACoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexAround TownRegular600 g / 1 lb 5.2 oz?
Arc'teryx Atom AR (Men's - Women's)18/-8ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Continuous120 g/m2 + 80 g/m2 + 60 g/m230D TyonoAll RoundRegular475 g / 1 lb 74 cm / 29.1 in
Patagonia Downdrift (Men's - Women's)18/-8NoNoNoDown600279167,400N/AN/A4.2 oz polyesterAround TownRegular1.014 kg / 2 lb 3.8 oz?
Arc'teryx Magnus (Men's)19/-7NoNoNoParkaN/AN/AN/ACoreloft80 gN60p Gore-Tex 2LAround TownRegular690 g / 1 lb 8.3 oz83 cm / 32.5 in
Arc'teryx Agrium (Men's - Women's)21/-6NoYesNoDown85011799,450N/AN/AAratoAll RoundRegular365 g / 12.9 oz75 cm / 29.5 in
Patagonia AlpLight Down (Men's - Women's)21/-6NoYesNoDown80010080,000N/AN/A0.8 oz 10D polyesterAll RoundSlim270 g / 9.5 oz74 cm / 29 in
Arc'teryx Beta Insulated (Men's - Women's)21/-6ReviewYes, zipsNoYesSyntheticN/AN/AN/ACoreloft Continuous80 g/m²2L 40D Gore-TexAll RoundRegular680 g / 1 lb 8 oz78.5 cm / 31 in
Patagonia Topley (Men's)23/-5NoNoYesDown700172120,400N/AN/A6 oz polyesterAll RoundRegular1.133 kg / 2 lb 8 oz77 cm / 30.5 in
Arc'teryx Alpha IS (Men's)23/-5NoYesYesSyntheticN/AN/AN/ACoreloft Continuous65 g/m²N40p-X 2L Gore-TexClimbingRegular610 g / 1 lb 5.5 oz78 cm / 30.75 in
Rab Xenon 2.0 (Men's - Women's)23/-5NoYesYesSyntheticN/AN/AN/APrimaLoft Silver60 g30D Pertex QuantumAll RoundRegular385 g / 13.6 oz71.5 cm / 28.1 in
Patagonia Down Sweater (Men's - Women's)23/-5ReviewNoYesNoDown800150120,000N/AN/A1.4 oz 20x30D polyesterAll RoundRegular428 g / 15.1 oz67 cm / 26.25 in
Arc'teryx Ralle Parka (Men's)25/-4NoNoYesParkaN/AN/AN/ACoreloft 80 g/m²2L 40D Gore-TexAround TownRegular735 g / 1 lb 9.9 oz?
Patagonia Silent Down (Men's - Women's)26/-3ReviewNoNoNoDown70010976,300N/AN/A2.2 oz polyesterAround TownRegular585 g / 1 lb 4.7 oz74 cm / 29 in
Arc'teryx Therme Insulated (Men's)26/-3ReviewNoNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²2L Gore-TexAround TownRegular960 g / 2 lb 1.9 oz73 cm / 28.75 in
Arc'teryx Cerium (Men's - Women's)26/-3NoYesNoDown85011396,050Coreloft 80 + 100 g/m²Arato 15All RoundTrim335 g / 11.8 oz?
Mountain Hardwear GW/2 (Men's - Women's)28/-2NoYesNoDown8008568,000N/AN/A10D Ripstop NylonAll RoundTrim250 g / 8.8 oz70 cm / 27.5 in
Arc'teryx Cerium LT (Men's - Women's)28/-2ReviewNoYesNoDown85010286,700Coreloft 80 + 100 g/m²Arato 10All RoundTrim305 g / 10.8 oz72 cm / 28.3 in
Arc'teryx Nuclei FL (Men's - Women's)32/0ReviewNoYesNoSyntheticN/AN/AN/ACoreloft Continuous65 g/m²Arato 10rClimbingTrim325 g / 11.5 oz75 cm / 29.5 in
Patagonia DAS Light (Men's - Women's)34/1NoYesYesSyntheticN/AN/AN/APlumaFill65 g0.8-oz 10-denier Pertex Quantum ProClimbingRegular320 g / 11.3 oz77 cm / 30.5 in
Patagonia Micro Puff (Men's - Women's)36/2ReviewNoYesNoSyntheticN/AN/AN/APlumaFill65 gPertex QuantumAll RoundTrim298 g / 10.5 oz75 cm / 29.5 in
Patagonia Isthmus (Men's)36/2NoNoNoParkaN/AN/AN/AThermoGreen60 g4.2 oz polyesterAround TownRegular895 g / 1 lb 15.6 oz70 cm / 27.5 in
Arc'teryx Proton LT (Men's - Women's)37/3ReviewNoNoNoSyntheticN/AN/AN/ACoreloft Compact80 g/m2 + 60 g/m2Fortius Air 20ClimbingTrim375 g / 13.2 oz75 cm / 29.4 in
Patagonia Nano Puff (Men's - Women's)37/3ReviewNoYesNoSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco60 g22D PolyesterAll RoundRegular363 g / 12.8 oz71.5 cm / 28 in
Arc'teryx Norvan SL Ins. (Men's - Women's)39/4NoYesNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²Gore-Tex ShakeDryRunningTrim270 g / 9.5 oz71.5 cm / 28.1 in
Patagonia Nano Air (Men's - Women's)41/5ReviewNoNoNoSyntheticN/AN/AN/AFullRange60 g33D Nylon ripstopAll RoundTrim318 g / 11.2 oz?
Arc'teryx Atom LT (Men's - Women's)43/6ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Continuous60 g/m²20D TyonoAll RoundTrim375 g / 13.2 oz74 cm / 29.1 in
Arc'teryx Cerium SL (Men's - Women's)43/6ReviewNoYesNoDown8505849,300Coreloft 40 + 100 g/m²Arato 7All RoundTrim215 g / 7.6 oz69 cm / 27.2 in
Arc'teryx Proton Hybrid (Men's - Women's)46/8ReviewNoNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²Fortius™ Air 50All RoundTrim365 g / 12.9 oz?
Arc'teryx Proton FL (Men's)48/9ReviewNoNoNoSyntheticN/AN/AN/AOcta Loft94 g/m²Fortius Air 20ClimbingTrim323 g / 11.4 oz77 cm / 30.4 in
Arc'teryx Atom SL (Men's - Women's)52/11ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²20D TyonoAll RoundTrim245 g / 8.6 oz72 cm / 28.3 in
REI Stormhenge Hybrid (Men's - Women's)TestingYes, zipsNoNoDown850?N/AN/A40D + 80DAll RoundRegular900 g / 1 lb 15.75 oz80 cm / 31.5 in
Arc'teryx Monitor Insulated (Women's)TestingNoNoYesParkaN/AN/AN/ACoreloft80 + 100 g/m²40D 3L Gore-TexAround TownOversized645 g / 1 lb 6.8 oz93 cm / 37 in
Arc'teryx Coelle (Women's)TestingNoNoYesParkaN/AN/AN/ACoreloft80 + 140 g/m²40D 2L Gore-TexAround TownRegular460 g / 1 lb 0.2 oz93 cm / 37 in

If you want to read more about them simply visit their reviews. 

Both jackets are true to size, by the way. So I wouldn't recommend sizing up or down. 

Atom LT 2020 Revision

Not much has changed really.

With the 2020 revision, Atom LT is given a dope-dyed liner, a new construction on the cuff and is now 1" (2.5 cm) longer. 

So, as a result;

  • Cuff construction allows for easier on/off and layering,
  • Durability is slightly increased now owing to Dope-dyed liner (Dope Permeairâ„¢ 20 - 100% nylon) - but the difference is really not noticeable at all.  

Additionally, Dope Dying is much more environmentally friendly, so Arc'teryx is also reducing their mark on the planet by incorporating it into the production process.

Proton LT 2019 Revision

Fortius 40 vs 20

In order to increase breathability, designers decided to change the insulation material from Fortius 40 to Fortius 20. In English: Fabric is now slightly thinner but also more air-permeable.

This is measured with a metric called CFM (cubic feet per minute). The new Proton LT has a CFM of 40 compared to the CFM of 20 that belongs to the older version. 

Coreloft Continuous vs Compact

Because the Coreloft Compact of the revised (new) version is composed of highly crimped fibers, it's more compressible and air-permeable compared to the Coreloft Continuous of the previous version. 

The Coreloft Continous, on the other hand, has more fluff at the beginning (so slightly higher CLO value - which means slightly warmer) but can pack down over time meaning that the jacket will eventually lose some of its fluff and warmth a little bit. 

We can say that the warmth didn't really change noticeably (if at all). 

Continuous is also more durable since it's less air-permeable. 

Since the design intent of Proton LT is a highly air-permeable jacket for high output activity, design team decided to switch to Coreloft Compact for air-permeability and packability reasons.

Results

Compared to the previous model, the most recent (2019) version of Proton LT is;

  • lighter, 
  • more packable,
  • more breathable,
  • slightly less durable.

Fit remains the same. 

Conclusion

These hoodies are much more similar than they're different. Get the Atom LT if you want slightly higher breathability, and get the Proton LT if you want slightly higher warmth, durability and weather & abrasion resistance. 

Links:

  • https://arcteryx.com/us/en/shop/mens/proton-lt-hoody
  • https://arcteryx.com/us/en/shop/mens/atom-lt-hoody
  • https://arcteryx.com/us/en/shop/womens/proton-hoody
  • https://arcteryx.com/us/en/shop/womens/atom-hoody
  • Arc'teryx Jacket Finder: https://arcteryx.com/us/en/shop/jacket-finder/

If you prefer videos, here's a good review of Atom LT:

That of Proton LT:

Transcript of Customer Service Chat for 2020 Atom LT Updates

  • Hi there! My name is Camille, how can I help you today?
  • Hi Camille. I was wondering about the updates that took place for the 2020 revision of Atom LT. Can you list all the changes, please?
  • Hi there, thanks for chatting. I sure can.
  • The redesign includes an update to the cuff construction for easier on/off and layering, an updated material package for enhanced durability, updated fit, and a dope dyed liner.
  • What do you mean by updated material package?
  • We updated the materials the Atom LT is made of, you can read a list of them here:
  • Coreloftâ„¢ Compact (60 g/m² ) insulation. Highly crimped, multi-denier siliconized polyester yarn that has undergone a special process which reduces the thickness of the material by 50%, without reducing its insulation value by the same amount. Lightweight, breathable, thermally efficient 100% polyester fibre.
    Tyonoâ„¢ 20 denier shell with DWR treatment - 100% nylon
    Stretch fleece - 94% polyester, 6% elastane
    Dope Permeairâ„¢ 20 - 100% nylon
  • Last year's model did not include the Dope Permeair.
  • How does it affect the use of this jacket in practice?
  • It doesn't effect it, really - Dope Dying is much more environmentally friendly so we are reducing our mark on the planet by incorporating it into the production process.
  • Overall the updated Atom saw more changes with the fit, durability and construction on the cuff.
  • If anything it's very slightly more durable now.
  • Which update made it more durable?
  • The additional dope dyed liner.
  • Ok, thanks. Lastly, how did the fit change?
  • It is about 1" longer than the previous year's model.
  • So other than this hem length difference, everything stays the same in the fit department?
  • That's right.


I hope this post was helpful for you to learn more about the jacket(s) in your mind.


Feel free to ask me any questions or provide feedback and I'll be happy to respond in the comment section below.


Guide: Insulated & Shell Jackets

Start here:

  • Best Arc'teryx Jackets: My Top Picks
  • Best Patagonia Jackets: My Top Picks
  • Best Down Jackets: My Top Picks
  • Best Synthetic Insulated Jackets: My Top Picks
  • Temperature Ratings of Best Insulated Jackets
  • Arc'teryx Wiki: Complete Data Set
  • CLO values: Explained, compared & plotted
  • Ultimate Size Guide to Arc'teryx
  • StormHood vs DropHood

Complete list:

  • All Arc'teryx Shell Jackets sorted by performance
  • All Arc'teryx Ski Jackets sorted by performance
  • All Patagonia Ski Jackets sorted by performance
  • All Patagonia Winter Jackets compared
  • All Patagonia Fleeces compared
  • All Patagonia Rain Jackets compared
  • All Patagonia Down Jackets compared

Synthetic Insulated Jackets

  • Arc'teryx Proton LT
  • Patagonia Nano Air
  • Arc'teryx Atom LT
  • Arc'teryx Atom AR
  • Patagonia Nano Puff
  • Patagonia Micro Puff
  • Arc'teryx Atom SL
  • Arc'teryx Proton FL
  • Arc'teryx Proton Hybrid Hoody
  • Arc'teryx Fission SV
  • Arc'teryx Dually Belay Parka
  • Arc'teryx Atom SL Anorak
  • Arc'teryx Kappa

Down Jackets

  • Arc'teryx Cerium LT
  • Arc'teryx Cerium SV
  • Arc'teryx Cerium SL
  • Arc'teryx Thorium AR
  • Patagonia Down Sweater
  • Arc'teryx Firebee AR
  • Arc'teryx Ceres SV

Parkas

  • Arc'teryx Thorsen
  • Arc'teryx Therme
  • Arc'teryx Camosun
  • Arc'teryx Patera
  • Arc'teryx Centrale
  • Patagonia Tres
  • Patagonia Vosque

Shell Jackets

  • Arc'teryx Beta SV
  • Arc'teryx Beta FL
  • Arc'teryx Beta AR
  • Arc'teryx Alpha AR
  • Arc'teryx Alpha SV
  • Arc'teryx Gamma MX
  • Arc'teryx Gamma LT
  • Arc'teryx Gamma SL

Ski Jackets

  • Arc'teryx Rush
  • Arc'teryx Rush IS
  • Arc'teryx Sabre LT
  • Arc'teryx Sabre AR
  • Arc'teryx Cassiar
  • Arc'teryx Sidewinder
  • Arc'teryx Macai

Fleece Jackets

  • Patagonia R1
  • Patagonia R2
  • Patagonia Synchilla
  • Patagonia Better Sweater

Wind Jackets

  • Arc'teryx Solano
  • Arc'teryx Nuclei FL
  • Patagonia Houdini
  • Patagonia Houdini Air
  • Arc'teryx Squamish
  • Arc'teryx Incendo
  • Arc'teryx Norvan SL
  • Arc'teryx Trino SL

Rain Jackets

  • Patagonia Torrentshell
  • Patagonia Torrentshell Insulated
  • Arc'teryx Beta SL Hybrid
  • Arc'teryx Zeta FL

Also see:

  • Arc'teryx vs Patagonia
  • List of Manufacturing Facilities of all Arc'teryx Jackets

Thank you for reading!

Filed Under: Synthetic Insulated Jackets Tagged With: arcteryx, arcteryx insulated jackets, arcteryx jackets, jackets

Reader Interactions

Comments

  1. Craig G says

    October 19, 2019 at 4:13 am

    What do you think of the updated Fall 2019 Proton LT compared to the updated Fall 2019 Patagonia Nano Air? I think this would be a great comparison!

    • Canberk Koksal says

      October 19, 2019 at 11:58 am

      Craig,

      Most important thing to note here is that these 2 jackets are MUCH more alike than they’re not. I’d say they’re 90% the same (except the Air looks quite ugly and Proton LT looks quite gorgeous to most people).

      The scores in this chart might help you:
      https://outdoorcrunch.com/synthetic-insulated-jackets/

      As you see, Nano Air is a perfect technical piece. Proton LT, on the other hand, is also a perfect technical piece, but, compared to Air, it’s also more suitable for casual outgoings as well.

      If you’ll be using the jacket both in the town when it’s cold out AND during high output activities, I’d recommend Proton LT.

      If you’ll be using it during high output activities only, I’d recommend the Air.

      Hope this helps.

  2. Neonomide says

    October 27, 2019 at 8:53 pm

    Great comparison! Some notes though. I think that the new Proton has a new internal liner as well, no? If Permeair is new, then basically they changed every material in the jacket! Seems a pretty big overhaul for me. I always felt that the old Proton had a too thick outer fabric, and it could pack a bit better and breathes less than Nano Air. Preferred the Proton fit all the way. Atom LT did not do it for me (those annoying side panels).

    Arc’teryx developed a lighter Proton FL at the same time with Octaloft insulation and the lighter Fortius 20 outer fabric (which it now shares with new Proton LT. I’d have to check out the new LT out if I didn’t have the old one. For now, I’ll be getting the FL for layering and maximizing the breathability.

    In the meanwhile, I’d love to see Proton LT old vs new comparisons!

    • Rob S says

      September 4, 2020 at 3:59 pm

      Just discovered Arcteryx a couple years ago, and I’m glad I did. Nothing else provides the technical details involved it making super light but warm outdoor gear in my opinion. Just curious as to how the Atom AR was rated as providing more warmth than the Cerium Lt? I have the Cerium Lt and sweat with it indoors at room temp. I know the Atom AR has slightly more synthetic insulation,, but figured as far as strictly warmth, down is warmer overall, no? If that’s the case I’m going to seriously look into an Atom AR for the future as I do prefer synthetic over down,,, mainly because with down you can never wear anything black or dark colored without feathers attaching to your sweaters etc. Great detailed review. Thank you.

  3. Janusz Martinsson says

    May 1, 2020 at 5:31 am

    Hi!

    I live in Sweden and have both jackets.
    You forgot to mention one important thing in difference.

    The Atom LT can stand against in fairly windy conditions while the Proton LT has absolutely no wind barrier at all and you have to put on a shell. The wind blows right through the Proton.

    • Canberk says

      May 1, 2020 at 10:05 am

      Thank you for sharing your thoughts and experiences Janusz 🙂

  4. Thomas says

    August 30, 2020 at 6:44 pm

    Hi,

    The Atom LT has been updated with the same Coreloft Compact as Proton LT this year, so with 20g less but same insulation materials, isn’t the Atom LT being less warmer but more air-permeabe in 2020?

    Thanks

  5. Ross m says

    October 21, 2020 at 6:15 pm

    Where does the Gamma LT Jacket fit into this?

    Thanks for the great review!

    • Canberk says

      October 23, 2020 at 12:52 pm

      Hi Ross,

      Gamma LT isn’t insulated. Check out my guide to Arc’teryx Shells if you’re interested in more information about the Gamma LT.

  6. Giuseppe says

    December 5, 2020 at 5:01 pm

    Hello,

    love your reviews, I would like to know your opinion about the Proton LT and the Atom AR.

    Which one do you recommend to wear for a daily base stand alone jacket (I live in London, so basically deal with the UK weather)

    Thanks

    • Canberk says

      December 8, 2020 at 12:28 pm

      Thank you for your comment Giuseppe!

      Atom AR is warmth focused, and the Proton LT is breathability focused. Correct me if I’m wrong, but London must be freezing now haha. So, unless you’re planning to use this jacket for high output activities, I’d get the Atom AR. Perfect for stationary use. Plus: Synthetic insulated structure of the Atom AR doesn’t keeps warm even under damp weather (unlike down insulated jackets). An important point for London, if you ask me.

  7. Matt says

    February 7, 2021 at 5:29 am

    Anyone else noticed a size difference between Proton and Atom?

    I have historically always been a small in everything Arc’teryx but not as of late.

    Small in Nuclei, Proton and also the Kyanite (I know it’s a fleece but nonetheless) is dreadfully tight and I have had to go up to a medium. Small still fits perfect in both 2020 Atom iterations though. Go figure…

  8. Tze says

    March 24, 2021 at 10:58 am

    Hi –

    It seems the Atom LT has been updated with Coreloft Compact 60gm. Have you tested this version as it would seem that this should improve the breath ability?

    Thanks

  9. olivier says

    November 30, 2021 at 8:20 pm

    Hey thanks for the reviews it really helps! I live in Montreal, Canada and I’m shopping layers to put underneath my Beta AR. I have a very good first layer, a couple of fleeces and obviously a Beta AR. So from what I understood, when I go resort skiing, the Atome LT and Proton LT would both be good options? I’m used to having one ski jacket and this layer system is diffirent for me. Thanks for your help!

Primary Sidebar

Crunch Search

About me

Hey, what's up? Canberk here. I try to approach outdoor gear from a scientific point of view. Here's more about me.

  • Email
  • Facebook
  • Instagram
  • LinkedIn

Featured Posts

  • Temperature Ratings of Insulated Jackets
  • Best Arc’teryx Jackets
  • Best Patagonia Jackets

window.dataLayer = window.dataLayer || []; function gtag(){dataLayer.push(arguments);} gtag('js', new Date()); gtag('config', 'G-GDD0YD30SK');

  • BASICS
  • PRO TIPS
  • GEAR
  • MISCELLANEOUS
  • ABOUT
  • PRIVACY POLICY