OutdoorCrunch

Home / Gear / Jackets / Insulated Jackets / Synthetic Insulated Jackets

ABOUT ME
Hey, what's up? Canberk here. A former General Electric Aviation Design Engineer. Academically involved in cold weather outdoor gear, particularly wearable heating systems using conductive polyester and polyamide yarns. Read more about me. 

Arc’teryx Proton vs Atom: Bought all 7 items (+temp ratings)

Last updated: November 22, 2023 by

  • This article is revised after Arc'teryx FW24 update. 

Arc'teryx Atoms vs Protons: Overview

NameEst. Temp (F/C)BreathabilityWind Res.Abrasion res.ReviewSynthetic FillSynth. Fill WeightFace FabricPit venting?Two way zipper?Stuffs into itself?ActivityFitWeightLength (CB)Internal pocketsExternal pockets
Arc'teryx Alpha (Men's - Women's)-18/-28No dataNo dataNo dataReviewCoreloft90 g/m²N30r 2L GoreTex InfiniumNoYesYesClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 inNo
Feathered Friends Khumbu-17/-27No dataNo dataNo dataPrimaloft Gold200 gPretex Shield XTNoNoYesAll RoundRegular960 g / 2 lb 2 oz?No
Arc'teryx Ceres SV (Men's - Women's)-15/-26No dataNo dataNo dataReviewCoreloft?Arato 30NoYesYesAll RoundRegular880 g / 1 lb 15 oz86 cm / 34 inYes
Mountain Equipment K7 (Men's)-13/-25No dataNo dataNo dataN/AN/A30D DriliteNoYesYesAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 inNo
Rab Positron Pro (Men's)-13/-25No dataNo dataNo dataN/AN/A40D Pertex Quantum ProNoYesYesAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 inNo
Arc'teryx Therme SV (Men's)-11/-24No dataNo dataNo dataReviewCoreloft60 g/m²2L Gore-TexNoYesNoAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 inNo
Patagonia Grade VII-11/-24No dataNo dataNo dataN/AN/A1.2 oz 15 & 20D Pertex QuantumNoYesNoAround TownRegular743 g / 1 lb 10.1 oz83 cm / 32.5 inYes
Patagonia AlpLoft (Men's - Women's)-10/-23No dataNo dataNo dataN/AN/APertex QuantomNoYesYesAll RoundRegular680 g / 1 lb 8 oz81 cm / 31.8 inNo
Arc'teryx Firebee AR (Men's - Women's)-10/-238/1010/10No dataReviewN/AN/AArato 7 & 10NoYesYesAll RoundRegular680 g / 1 lb 8 oz79 cm / 31 inYes
Mountain Equipment Exo (Men's)-10/-23No dataNo dataNo dataN/AN/ANylonNoYesYesAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 inNo
Arc'teryx Thorsen (Men's)-7/-22No dataNo dataNo dataReviewCoreloft60 g/m²90D 2L Gore-TexNoYesNoAround TownRegular1.1 kg / 2 lb 5.4 oz91 cm / 36 inYes
Patagonia Frozen Range (Men's - Women's)-6/-21No dataNo dataNo dataReviewN/AN/A4 oz 75-denier polyesterNoNoNoAround TownRegular1.253 kg / 2 lb 12.2 oz84 cm / 33 inYes
Mountain Equipment Li. Ec. (Men's - Women's)-5/-20No dataNo dataNo dataN/AN/A50D DriliteNoYesNoAll RoundRegular822 g / 1 lb 13 oz72 cm / 28 inYes
Arc'teryx Thorium Parka (Women's)-2/-19No dataNo dataNo dataReviewCoreloft80 + 140 g/m²Arato 20NoYesNoAround TownRegular610 g / 1 lb 5.5 oz115.8 cm / 45.6 inNo
Rab Neutrino Pro (Men's - Women's)-2/-19No dataNo dataNo dataN/AN/A20D Pertex Quantum ProNoYesYesAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 inNo
Arc'teryx Patera Long (Women's)0/-18No dataNo dataNo dataCoreloft60 + 80 g/m²2L Gore-TexNoYesNoAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 inNo
Patagonia Stormshadow (Men's)0/-18No dataNo dataNo dataN/AN/A75D PolyesterNoNoNoAround TownRegular1.182 kg / 2 lb 9.7 oz?No
Arc'teryx Beta Down Insulated (Men's)0/-18No dataNo dataNo dataCoreloft80 g/m²2L 40D Gore-TexYesYesNoAll RoundRegular760 g / 1 lb 10.8 oz79 cm / 31 inNo
Arc'teryx Dually Belay (Men's)0/-18No dataNo dataNo dataReviewThermaTek92 g/m²30D NylonNoYesYesAround TownRegular705 g / 1 lb 9 oz84 cm / 33 inYes
Arc'teryx Centrale (Women's)0/-18No dataNo dataNo dataReviewCoreloft60 g/m²N90p NylonNoYesNoAround TownRegular885 g / 1 lb 15.2 oz95 cm / 37.5 inYes
Arc'teryx Thorium SV Parka (Men's)0/-18No dataNo dataNo dataCoreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumNoYesNoAround TownRegular685 g / 1 lb 8.2 oz85 cm / 33.5 inNo
Arc'teryx Camosun (Men's)0/-18No dataNo dataNo dataReviewCoreloft140 g/m²N150p-X Gore-TexNoNoNoAround TownTrim960 g / 2 lb 1.9 oz80 cm / 31.5 inYes
Arc'teryx Cerium SV (Men's - Women's)0/-18No dataNo dataNo dataReviewCoreloft80 + 140 g/m²Arato 7 & 10NoNoYesAll RoundRegular415 g / 14.6 oz69.5 cm / 27.4 inYes
Arc'teryx Liatris Parka (Women's)2/-17No dataNo dataNo dataClimashield80 g/m2 + 60 g/m270D 3L Gore-TexNoNoNoAround TownRegular1.093 kg / 2 lb 6.6 oz109 cm / 43 inNo
Arc'teryx Revet (Men's)2/-17No dataNo dataNo dataN/AN/A20d nylon/spandex double weaveNoYesNoAround TownRegular755 g / 1 lb 10.6 oz91 cm / 36 inYes
Arc'teryx Thorium SV (Men's)3/-16No dataNo dataNo dataCoreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumNoYesYesAround TownRegular645 g / 1 lb 6.8 oz73 cm / 28.75 inNo
Arc'teryx Piedmont (Men's)3/-16No dataNo dataNo dataN/AN/AArato 10NoYesYesAround TownRegular515 g / 1 lb 2.2 oz82 cm / 32.25 inYes
Outdoor Research Sup. Alp. (Men's - Women's)3/-16No dataNo dataNo dataN/AN/A30D Pertex Quantum ProNoYesNoAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 inNo
Arc'teryx Fission SV (Men's - Women's)3/-163/10No dataNo dataReviewCoreloft Continuous90 + 65 g/m²N80p-X Gore-Tex 2LNoYesNoAll RoundRegular890 g / 1 lb 15.4 oz81 cm / 31.8 inYes
Arc'teryx Alessa Long3/-16No dataNo dataNo dataCoreloft80 + 120 g/m²N90p 2L Gore-TexNoNoNoAround TownRegular1.015 kg / 2 lb 3.8 oz123 cm / 48.5 inYes
Arc'teryx Radsten Parka (Men's)3/-16No dataNo dataNo dataCoreloft Compact120 g/m²NP100d Gore-Tex 2LNoNoNoAround TownRegular745 g / 1 lb 10.3 oz82 cm / 32.25 inYes
Rab Electron Pro (Men's - Women's)5/-15No dataNo dataNo dataN/AN/A20D Pertex Quantum ProNoYesYesAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 inNo
Rab Infinity Alpine (Men's)5/-15No dataNo dataNo dataN/AN/A30D & 13D Gore-Tex InfiniumNoYesYesAll RoundRegular551 g / 1 lb 3.4 oz76.5 cm / 30.1 inNo
Arc'teryx Alpha Lightweight (Men's - Women's)5/-15No dataNo dataNo dataCoreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumNoYesYesClimbingRegular540 g / 1 lb 3 oz79.5 cm / 31.25 inNo
Arc'teryx Therme Parka (Men's)5/-15No dataNo dataNo dataReviewCoreloft60 + 80 g/m²P75d PolyesterNoYesNoAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 inNo
Arc'teryx Liatris (Women's)5/-15No dataNo dataNo dataClimashield80 g/m2 + 60 g/m270D 3L Gore-TexNoNoNoAround TownRegular890 g / 1 lb 15.4 oz75 cm / 29.5 inNo
Arc'teryx Macai (Men's)5/-15No dataNo dataNo dataReviewCoreloft Compact60 + 100 g/m²N40p-X 3L Gore-TexYes, zipsNoNoSki/SnowboardRegular1 kg / 2 lb 4 oz76 cm / 30 inNo
Arc'teryx Nuclei SV (Men's - Women's)5/-151/1010/102/10ReviewCoreloft Continuous190 g/m2 + 90 g/m2Arato 15NoYesYesAll RoundRegular600 g / 1 lb 5.2 oz81 cm / 31.8 inNo2x dump1x chest
Black Diamond Access Down (Men's - Women's)7/-14No dataNo dataNo dataN/AN/A30D ripstop nylonNoYesYesAll RoundRegular442 g / 15.6 oz76 cm / 29.75 inNo
Arc'teryx Kappa (Men's)7/-14No data9/109/10ReviewCoreloft Continuous140 g/m²N70p Gore ThermiumNoYesNoAll RoundRegular755 g / 1 lb 10.6 oz80 cm / 31.5 inYes
Patagonia Jackson Glacier Parka (Men's - Women's)7/-14No dataNo dataNo dataN/AN/A50D PolyesterNoNoNoAround TownRegular1.142 kg / 2 lb 8.3 oz?No
Arc'teryx Prema Down Coat (Women's)7/-14No dataNo dataNo dataN/AN/ANylonNoYesNoAround TownRegular794 g / 1 lb 12 oz117 cm / 46.1 inYes
Arc'teryx Radsten Insulated (Men's)7/-14No dataNo dataNo dataCoreloft Compact120 g/m²NP100d Gore-Tex 2LNoNoNoAround TownRegular715 g / 1 lb 9.2 oz73 cm / 28.75 inYes
Rab Microlight Alpine (Men's - Women's)7/-14No dataNo dataNo dataN/AN/A30D Pertex QuantumNoNoYesAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 inNo
Feathered Friends Eos8/-13No dataNo dataNo dataN/AN/APertex QuantumNoNoYesAll RoundRegular306 g / 10.8 oz?No
Patagonia Macro Puff (Men's - Women's)8/-13No dataNo dataNo dataReviewPlumaFill135 + 90 g10D Recycled nylon ripstopNoNoNoAll RoundRegular435 g / 15.3 oz79 cm / 31 inYes
Arc'teryx Macai Lightweight (aka LT) (Men's)8/-13No dataNo dataNo dataCoreloft Compact60 g/m²N40p-X 3L Gore-TexYes, zipsNoNoSki/SnowboardRegular855 g / 1 lb 14.2 oz74 cm / 29.1 inNo
Patagonia Tres 3-in-1 (Men's - Women's)8/-13No dataNo dataNo dataReviewN/AN/A5.5 oz polyesterNoNoNoAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 inNo
Arc'teryx Seyla (Women's)8/-13No dataNo dataNo dataN/AN/AArato 10NoYesNoAround TownRegular507 g / 1 lb. 1.9 oz.87 cm / 34.4 inYes
Arc'teryx Koda (Men's)8/-13No dataNo dataNo dataCoreloft80 + 140 g/m²N80p-X Gore-TexNoNoNoAround TownRegular720 g / 1 lb 9.4 oz75 cm / 29.5 inYes
Patagonia DAS (Men's - Women's)10/-121/109/103/10ReviewPrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProNoYesYesAll RoundRegular555 g / 1 lb 3.6 oz84 cm / 33 inNo2x dump1x chest
Patagonia Vosque 3-in-1 (Women's)10/-12No dataNo dataNo dataReviewThermoLite100 g65% nylon, 35% polyesterNoNoNoAround TownRegular1.360 kg / 3 lb90 cm / 35.5 inNo
Arc'teryx Thorium (Men's - Women's)12/-11No dataNo dataNo dataReviewCoreloft80 + 140 g/m²Arato 30NoYesYesAll RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 inNo
Patagonia City Storm Down (Men's - Women's)12/-11No dataNo dataNo dataN/AN/A4.2 oz polyesterNoNoYesAll RoundRegular468 g / 16.5 oz91 cm / 36 inYes
Patagonia Jackson Glacier (Men's - Women's)12/-11No dataNo dataNo dataReviewN/AN/A3.6 oz 50D polyesterNoYesNoAround TownRegular880 g / 1 lb 15 oz79 cm / 31 inNo
Arc'teryx Thorium AR 2020 (Men's - Women's)14/-10No dataNo dataNo dataReviewCoreloft80 + 140 g/m²Arato 30NoNoYesAll RoundRegular490 g / 1 lb 1.3 oz72 cm / 28.3 inYes
Patagonia Fitz Roy (Men's - Women's)14/-10No dataNo dataNo dataN/AN/A20D NylonNoNoYesAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 inNo
Arc'teryx Sensa (Women's)14/-10No dataNo dataNo dataCoreloft Compact120 g/m²NP100d Gore-Tex 2LNoYesNoAround TownRelaxed785 g / 1 lb 11.7 oz86 cm / 34 inYes
Arc'teryx Ralle (Men's)14/-10No dataNo dataNo dataCoreloft120 g/m²N80p-X 2L Gore-TexNoYesNoAround TownRegular735 g / 1 lb 9.9 oz83 cm / 32.5 inNo
Patagonia Hi-Loft (Men's - Women's)14/-10No dataNo dataNo dataReviewN/AN/A1.4 oz 30D polyesterNoNoYesAll RoundRegular540 g / 1 lb 3 oz76 cm / 30 inYes
Arc'teryx Coelle (Women's)14/-10No dataNo dataNo dataCoreloft80 + 140 g/m²40D 2L Gore-TexNoYesNoAround TownRegular?95 cm / 37.4 inNo
REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10No dataNo dataNo dataN/AN/APertex mini ripstop nylonNoNoYesAll RoundRegular340 g / 13.75 oz74 cm / 29.25 inNo
Arc'teryx Beta Insulated Coat (Women's)16/-9No dataNo dataNo dataReviewCoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexNoYesNoAround TownRegular600 g / 1 lb 5.2 oz86 cm / 34 inNo
Arc'teryx Atom Heavyweight (aka AR) (Men's - Women's)18/-84/108/108/10ReviewCoreloft Continuous120 g/m2 + 80 g/m2 + 60 g/m230D TyonoYes, meshNoNoAll RoundRegular475 g / 1 lb 74 cm / 29.1 inNoatomproton1x chest-
Patagonia Downdrift (Men's - Women's)18/-8No dataNo dataNo dataN/AN/A4.2 oz polyesterNoNoNoAround TownRegular1.014 kg / 2 lb 3.8 oz?No
Arc'teryx Magnus (Men's)19/-7No dataNo dataNo dataCoreloft80 gN60p Gore-Tex 2LNoNoNoAround TownRegular690 g / 1 lb 8.3 oz83 cm / 32.5 inYes
Rab Infinity Microlight (Men's - Women's)19/-7No dataNo dataNo dataN/AN/A13D Gore-Tex InfiniumNoNoYesAll RoundRegular452 g / 15.9 oz74 cm / 29.1 inNo
Arc'teryx Proton Heavyweight (Men's - Women's)21/-66/107/1010/10ReviewCoreloft100 g/m2 + 60 g/m2Fortius Air 50NoNoNoAll RoundRegular540 g / 1 lb 3 oz77 cm / 30.5 inNoatomproton2x dump2x chest
Arc'teryx Agrium (Men's - Women's)21/-6No dataNo dataNo dataN/AN/AAratoNoNoYesAll RoundRegular365 g / 12.9 oz75 cm / 29.5 inYes
Arc'teryx Beta Insulated (Men's - Women's)21/-6No dataNo dataNo dataReviewCoreloft Continuous80 g/m²2L 40D Gore-TexYes, zipsYesNoAll RoundRegular680 g / 1 lb 8 oz78.5 cm / 31 inNo
Arc'teryx Patera (Women's)21/-6No dataNo dataNo dataReviewCoreloft60 + 80 g/m²2L Gore-TexNoYesNoAround TownTrim867 g / 1 lb 14.6 oz99 cm / 39 inNo
Patagonia Topley (Men's)23/-5No dataNo dataNo dataN/AN/A6 oz polyesterNoYesNoAll RoundRegular1.133 kg / 2 lb 8 oz77 cm / 30.5 inNo
Arc'teryx Alpha IS (Men's)23/-5No dataNo dataNo dataCoreloft Continuous65 g/m²N40p-X 2L Gore-TexNoYesYesClimbingRegular610 g / 1 lb 5.5 oz78 cm / 30.75 inYes
Patagonia Down Sweater (Men's - Women's)23/-5No dataNo dataNo dataReviewN/AN/A1.4 oz 20x30D polyesterNoNoYesAll RoundRegular428 g / 15.1 oz67 cm / 26.25 inNo
Arc'teryx Epsilon (Men's)26/-3No dataNo dataNo dataCoreloft Compact80 g/m²Fortius 1.0NoNoNoAround TownRegular644 g / 1 lb 6.7 oz?No1x chest-
Patagonia Silent Down (Men's - Women's)26/-3No dataNo dataNo dataReviewN/AN/A2.2 oz polyesterNoNoNoAround TownRegular585 g / 1 lb 4.7 oz74 cm / 29 inNo
Arc'teryx Therme Insulated (Men's)26/-3No dataNo dataNo dataReviewCoreloft Compact40 g/m²2L Gore-TexNoNoNoAround TownRegular960 g / 2 lb 1.9 oz73 cm / 28.75 inYes
Arc'teryx Cerium (aka LT) (Men's - Women's)26/-3No dataNo dataNo dataReviewCoreloft80 + 100 g/m²Arato 15NoNoYesAll RoundTrim335 g / 11.8 oz72 cm / 28.3 inNo
Mountain Hardwear GW/2 (Men's - Women's)28/-2No dataNo dataNo dataN/AN/A10D Ripstop NylonNoNoYesAll RoundTrim250 g / 8.8 oz70 cm / 27.5 inNo
Arc'teryx Cerium LT 2020 (Men's - Women's)28/-2No dataNo dataNo dataReviewCoreloft80 + 100 g/m²Arato 10NoNoYesAll RoundTrim305 g / 10.8 oz72 cm / 28.3 inYes
Arc'teryx Nuclei (aka FL) (Men's - Women's)32/02/109/102/10ReviewCoreloft Continuous65 g/m²Arato 10rNoNoYesAll RoundRegular325 g / 11.5 oz75 cm / 29.5 inNo2x dump-
Patagonia DAS Light (Men's - Women's)34/12/108/102/10ReviewPlumaFill65 g10D Pertex Quantum ProNoYesYesAll RoundRegular320 g / 11.3 oz77 cm / 30.5 inNo-1x chest
Patagonia Isthmus (Men's)36/2No dataNo dataNo dataThermoGreen60 g4.2 oz polyesterNoNoNoAround TownRegular895 g / 1 lb 15.6 oz70 cm / 27.5 inNo
Patagonia AlpLight (Men's - Women's)36/2No dataNo dataNo dataN/AN/A0.8 oz 10D polyesterNoNoYesAll RoundSlim270 g / 9.5 oz74 cm / 29 inNo
Arc'teryx Proton (aka LT) (Men's - Women's)37/37/107/108/10ReviewCoreloft Compact80 g/m2 + 60 g/m2Fortius Air 20NoNoNoClimbingTrim375 g / 13.2 oz75 cm / 29.4 inNoatomproton-1x chest
Patagonia Nano Puff (Men's - Women's)37/34/106/106/10ReviewPrimaLoft Gold Insulation Eco60 g22D PolyesterNoNoYesAll RoundRegular363 g / 12.8 oz71.5 cm / 28 inNo1x chest-
Arc'teryx Norvan SL Ins. (Men's - Women's)39/4No dataNo dataNo dataCoreloft Compact40 g/m²Gore-Tex ShakeDryNoNoYesRunningTrim270 g / 9.5 oz71.5 cm / 28.1 inYes
Patagonia Micro Puff (Men's - Women's)41/55/106/105/10ReviewPlumaFill65 gPertex QuantumNoNoYesAll RoundRegular298 g / 10.5 oz75 cm / 29.5 inNo2x dump-
Patagonia Nano Air (Men's - Women's)41/57/105/105/10ReviewFullRange60 g33D nylon ripstopNoNoYesAll RoundTrim318 g / 11.2 oz?No-2x chest
Arc'teryx Atom (aka LT) (Men's - Women's)43/69/106/107/10ReviewCoreloft Continuous60 g/m²20D TyonoYes, meshNoNoAll RoundTrim375 g / 13.2 oz74 cm / 29.1 inNoatomproton1x chest-
Arc'teryx Cerium Lightweight (aka SL) (Women's)43/6No dataNo dataNo dataReviewCoreloft40 + 100 g/m²Arato 7NoNoYesAll RoundTrim215 g / 7.6 oz69 cm / 27.2 in No
Arc'teryx Cerium Hybrid (Men's)44/7No dataNo dataNo dataCoreloft40 + 100 g/m²Arato 15 + Fortius Air 50NoNoYesAll RoundTrim260 g / 9.2 oz70 cm / 27.5 inNo
Arc'teryx Proton Hybrid (Men's - Women's)46/85/108/108/10ReviewCoreloft Compact40 g/m²Fortius Air 50NoNoNoAll RoundTrim365 g / 12.9 oz76 cm / 30 inNo-1x chest
Arc'teryx Proton Lightweight (aka FL) (Men's - Women's)48/98/104/107/10ReviewOcta Loft94 g/m²Fortius Air 20NoNoNoClimbingTrim343 g / 12.1 oz75 cm / 29.5 inNoatomproton-1x chest
Patagonia Nano Air Light Hybrid (Men's - Women's)50/10No dataNo dataNo dataFullRange40 g20D nylon ripstopNoNoNoAll RoundTrim335 g / 11.8 oz?No
Arc'teryx Atom Lightweight (aka SL) (Men's - Women's)52/1110/102/107/10ReviewCoreloft Compact40 g/m²20D TyonoYes, meshNoNoAll RoundTrim270 g / 9.5 oz72 cm / 28.3 inNoatomproton--

Here's how Arc'teryx compares these six: 

https://arcteryx.com/us/en/compare/X000007302/X000007487/X000005409/X000007398/X000007520/X000006908

I own all Atoms and Protons. Protons: Left side, from top to bottom: Hybrid, Lw (aka FL), base (aka LT) and Hw. Atoms: Right side, from top to bottom: SL (soon will become Lw), base (aka LT) and Hw (aka AR). All seven are hooded. The crossover Proton Hybrid (Men's - Women's - read my review) is kinda different than the other 6 so I didn't include it in this article. 

Y'all know this is just my opinion... right? 

  • Proton Heavyweight vs Atom Heavyweight (aka AR): Perfect picks for cold weather. If I were to buy either one of them, I'd get the new Proton Heavyweight (breathes more, offers much more pockets, more abrasion resistant). If, however, I were to maximize warmth & wind resistance at all costs, then I'd get an Atom Heavyweight. 
  • Proton (aka LT) vs Atom (aka LT): They're very similar. Both are perfect for high output activities and casual use at the same time. Proton offers a bit more abrasion resistance, Atom offers a bit more breathability. 
  • Proton Lightweight (aka FL) vs Atom SL (soon to be called Lightweight): Perfect for high output activities and casual use during chilly spring and summer mornings. Proton Lightweight offers a bit more abrasion resistance and one more pocket. Atom SL is more of an all rounder, offers a bit more breathability and is very slightly insulated only in the body.

Arc'teryx Atoms vs Protons: Summary

The Proton Hybrid (Men's - Women's - read review) is different than other items. I don't think it belongs in Atom vs Proton comparison, so I won't mention it here. 

I find Proton Lightweight extremely comfortable.

I love Proton Lightweight. Terrific fit and comfort. I'm 5'11" 165 lbs athletic build and size M fits me perfectly. Delivers that top notch quality feeling too. 

In order to choose between the other 6 items, I think you should determine the warmth you need first. Refer to the table above for this.

Now you know if you need a Hw, a base or a Lw. And only have to decide between Atom vs Proton.

All Atoms offer a side panel for increased breathability. It doesn't work that well in Atom Hw, but works perfectly with Atom and Atom SL, because their panels are much longer. 

All Atoms also come with a StormHood, unlike the Protons that come with a standard hood. 

I personally find the Protons a bit more suitable for high abrasion activities. Think lots of climbing, skiing and/or backpack use without a shell. 

Atoms, on the other hand, are a bit more suitable for all-round use and/or if you use the hood a lot. Think a combination of a variety of high output activities. It's perfectly fine for climbing, skiing and/or heavy backpack use as well. It's just if you'll do it, say, more than half the time, then a Proton can be more suitable. 

Notice where I say "a bit". 

The differences between the same line Atom vs Proton might not be that noticeable to you in practice. So if you care about the looks of your jackets as much as their performances, then I don't see anything wrong in going after the prettiest one. Especially if you're planning to use your jacket also around town. 

In other words... As long as you get Hw vs base vs Lw right, Atom vs Proton shouldn't matter equally as much. 

You might also want to check out this Arc'teryx's Naming Scheme Page as well, which includes both "Atom" and "Proton". 

  • Feed

Like hauntingly dark yet brilliantly brilliant electronic music? Check out my Hidden Electronic Gems playlist at Spotify. 

  • Just dropped

Naming changes

After changing the names of some women's jackets last season (Fall/Winter 2023), this season Arc'teryx moved on to make the same changes for men's counterparts as well.

  • Atom AR → Atom Heavyweight (in short, Hw)
  • Atom LT → Atom
  • Atom SL → Atom Lightweight (in short, Lw; and the change has not yet took place for men's counterparts)
  • Proton LT → Proton
  • Proton FL → Proton Lightweight (in short, Lw)
  • Proton Heavyweight and Proton Hybrid are new. 

Changes are exclusive to the naming and fit. Structural designs remain the same. The fit is being updated universally, for all Arc'teryx jackets. 

Arc'teryx Atom vs Proton
Arc'teryx Atoms vs Protons: Overview
Arc'teryx Atoms vs Protons: Summary
Naming changes
Arc'teryx Atom Heavyweight (aka AR) vs Proton Heavyweight: Overview
Warmth
Breathability
Hood
Pockets
Durability
Weather resistance
Cuffs
Fit
Arc'teryx Atom (aka LT) vs Proton (aka LT): Overview
Warmth
Weather Resistance & Durability
Breathability
Mobility & Comfort
Pockets
Packability
Fit
Cuffs
Historical Revisions
FW24: Atom LT and Proton LT changed to Atom and Proton
FW20: Atom LT revision
Transcript of my chat with the customer service
FW19: Proton LT revision
Arc'teryx Atom SL (soon to be called Lightweight) vs Proton Lightweight (aka FL): Overview
Warmth
Breathability
Hood
Weather resistance
Pockets
Weight
Packability
Sleeves and cuffs
Fit
Historical versions of Proton Lw
Arc'teryx Atoms vs Protons: Best colors

  • Temperature ratings of Arc'teryx jackets

NameEst. Temp (F/C)ReviewTypeFill Power (in3/oz)Fill Weight (g)Fill Volume (in3)Synthetic FillSynth. Fill WeightFace FabricPit venting?Two way zipper?Stuffs into itself?ActivityFitWeightLength (CB)
Arc'teryx Alpha (Men's - Women's)-18/-28ReviewDown8502968,875Coreloft90 g/m²N30r 2L GoreTex InfiniumNoYesYesClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 inNo
Feathered Friends Khumbu-17/-27Down90037812,000Primaloft Gold200 gPretex Shield XTNoNoYesAll RoundRegular960 g / 2 lb 2 oz?No
Arc'teryx Ceres SV (Men's - Women's)-15/-26ReviewDown8502407,196Coreloft?Arato 30NoYesYesAll RoundRegular880 g / 1 lb 15 oz86 cm / 34 inYes
Mountain Equipment K7 (Men's)-13/-25Down8003008,466N/AN/A30D DriliteNoYesYesAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 inNo
Rab Positron Pro (Men's)-13/-25Down8003008,466N/AN/A40D Pertex Quantum ProNoYesYesAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 inNo
Arc'teryx Therme SV (Men's)-11/-24ReviewParka7502115,582Coreloft60 g/m²2L Gore-TexNoYesNoAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 inNo
Patagonia Grade VII-11/-24Down8003359,453N/AN/A1.2 oz 15 & 20D Pertex QuantumNoYesNoAround TownRegular743 g / 1 lb 10.1 oz83 cm / 32.5 inYes
Patagonia AlpLoft (Men's - Women's)-10/-23Down8002958,325N/AN/APertex QuantomNoYesYesAll RoundRegular680 g / 1 lb 8 oz81 cm / 31.8 inNo
Arc'teryx Firebee AR (Men's - Women's)-10/-23ReviewDown8002256,349N/AN/AArato 7 & 10NoYesYesAll RoundRegular680 g / 1 lb 8 oz79 cm / 31 inYes
Mountain Equipment Exo (Men's)-10/-23Down8002657,478N/AN/ANylonNoYesYesAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 inNo
Arc'teryx Thorsen (Men's)-7/-22ReviewParka7501925,079Coreloft60 g/m²90D 2L Gore-TexNoYesNoAround TownRegular1.1 kg / 2 lb 5.4 oz91 cm / 36 inYes
Patagonia Frozen Range (Men's - Women's)-6/-21ReviewParka7002686,617N/AN/A4 oz 75-denier polyesterNoNoNoAround TownRegular1.253 kg / 2 lb 12.2 oz84 cm / 33 inYes
Mountain Equipment Li. Ec. (Men's - Women's)-5/-20Down7002957,284N/AN/A50D DriliteNoYesNoAll RoundRegular822 g / 1 lb 13 oz72 cm / 28 inYes
Arc'teryx Thorium Parka (Women's)-2/-19ReviewDown7502095,529Coreloft80 + 140 g/m²Arato 20NoYesNoAround TownRegular610 g / 1 lb 5.5 oz115.8 cm / 45.6 inNo
Rab Neutrino Pro (Men's - Women's)-2/-19Down8002125,982N/AN/A20D Pertex Quantum ProNoYesYesAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 inNo
Arc'teryx Patera Long (Women's)0/-18Parka7502045,397Coreloft60 + 80 g/m²2L Gore-TexNoYesNoAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 inNo
Patagonia Stormshadow (Men's)0/-18Parka7002596,395N/AN/A75D PolyesterNoNoNoAround TownRegular1.182 kg / 2 lb 9.7 oz?No
Arc'teryx Beta Down Insulated (Men's)0/-18Parka8501263,778Coreloft80 g/m²2L 40D Gore-TexYesYesNoAll RoundRegular760 g / 1 lb 10.8 oz79 cm / 31 inNo
Arc'teryx Dually Belay (Men's)0/-18ReviewSyntheticN/AN/AN/AThermaTek92 g/m²30D NylonNoYesYesAround TownRegular705 g / 1 lb 9 oz84 cm / 33 inYes
Arc'teryx Centrale (Women's)0/-18ReviewParka7501574,154Coreloft60 g/m²N90p NylonNoYesNoAround TownRegular885 g / 1 lb 15.2 oz95 cm / 37.5 inYes
Arc'teryx Thorium SV Parka (Men's)0/-18Down7501955,159Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumNoYesNoAround TownRegular685 g / 1 lb 8.2 oz85 cm / 33.5 inNo
Arc'teryx Camosun (Men's)0/-18ReviewParka7501052,778Coreloft140 g/m²N150p-X Gore-TexNoNoNoAround TownTrim960 g / 2 lb 1.9 oz80 cm / 31.5 inYes
Arc'teryx Cerium SV (Men's - Women's)0/-18ReviewDown8501624,857Coreloft80 + 140 g/m²Arato 7 & 10NoNoYesAll RoundRegular415 g / 14.6 oz69.5 cm / 27.4 inYes
Arc'teryx Liatris Parka (Women's)2/-17Parka8501364,078Climashield80 g/m2 + 60 g/m270D 3L Gore-TexNoNoNoAround TownRegular1.093 kg / 2 lb 6.6 oz109 cm / 43 inNo
Arc'teryx Revet (Men's)2/-17Parka750?N/AN/AN/A20d nylon/spandex double weaveNoYesNoAround TownRegular755 g / 1 lb 10.6 oz91 cm / 36 inYes
Arc'teryx Thorium SV (Men's)3/-16Down7501694,471Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumNoYesYesAround TownRegular645 g / 1 lb 6.8 oz73 cm / 28.75 inNo
Arc'teryx Piedmont (Men's)3/-16Parka7502185,767N/AN/AArato 10NoYesYesAround TownRegular515 g / 1 lb 2.2 oz82 cm / 32.25 inYes
Outdoor Research Sup. Alp. (Men's - Women's)3/-16Down8001825,136N/AN/A30D Pertex Quantum ProNoYesNoAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 inNo
Arc'teryx Fission SV (Men's - Women's)3/-16ReviewSyntheticN/AN/AN/ACoreloft Continuous90 + 65 g/m²N80p-X Gore-Tex 2LNoYesNoAll RoundRegular890 g / 1 lb 15.4 oz81 cm / 31.8 inYes
Arc'teryx Alessa Long3/-16ParkaN/AN/AN/ACoreloft80 + 120 g/m²N90p 2L Gore-TexNoNoNoAround TownRegular1.015 kg / 2 lb 3.8 oz123 cm / 48.5 inYes
Arc'teryx Radsten Parka (Men's)3/-16ParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LNoNoNoAround TownRegular745 g / 1 lb 10.3 oz82 cm / 32.25 inYes
Rab Electron Pro (Men's - Women's)5/-15Down8001805,079N/AN/A20D Pertex Quantum ProNoYesYesAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 inNo
Rab Infinity Alpine (Men's)5/-15Down8001754,938N/AN/A30D & 13D Gore-Tex InfiniumNoYesYesAll RoundRegular551 g / 1 lb 3.4 oz76.5 cm / 30.1 inNo
Arc'teryx Alpha Lightweight (Men's - Women's)5/-15Down8501173,508Coreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumNoYesYesClimbingRegular540 g / 1 lb 3 oz79.5 cm / 31.25 inNo
Arc'teryx Therme Parka (Men's)5/-15ReviewParka7501203,175Coreloft60 + 80 g/m²P75d PolyesterNoYesNoAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 inNo
Arc'teryx Liatris (Women's)5/-15Parka850932,788Climashield80 g/m2 + 60 g/m270D 3L Gore-TexNoNoNoAround TownRegular890 g / 1 lb 15.4 oz75 cm / 29.5 inNo
Arc'teryx Macai (Men's)5/-15ReviewShell750691,825Coreloft Compact60 + 100 g/m²N40p-X 3L Gore-TexYes, zipsNoNoSki/SnowboardRegular1 kg / 2 lb 4 oz76 cm / 30 inNo
Arc'teryx Nuclei SV (Men's - Women's)5/-15ReviewSyntheticN/AN/AN/ACoreloft Continuous190 g/m2 + 90 g/m2Arato 15NoYesYesAll RoundRegular600 g / 1 lb 5.2 oz81 cm / 31.8 inNo
Black Diamond Access Down (Men's - Women's)7/-14Down7001553,827N/AN/A30D ripstop nylonNoYesYesAll RoundRegular442 g / 15.6 oz76 cm / 29.75 inNo
Arc'teryx Kappa (Men's)7/-14ReviewSyntheticN/AN/AN/ACoreloft Continuous140 g/m²N70p Gore ThermiumNoYesNoAll RoundRegular755 g / 1 lb 10.6 oz80 cm / 31.5 inYes
Patagonia Jackson Glacier Parka (Men's - Women's)7/-14Parka7002185,383N/AN/A50D PolyesterNoNoNoAround TownRegular1.142 kg / 2 lb 8.3 oz?No
Arc'teryx Prema Down Coat (Women's)7/-14Parka750922,434N/AN/ANylonNoYesNoAround TownRegular794 g / 1 lb 12 oz117 cm / 46.1 inYes
Arc'teryx Radsten Insulated (Men's)7/-14ParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LNoNoNoAround TownRegular715 g / 1 lb 9.2 oz73 cm / 28.75 inYes
Rab Microlight Alpine (Men's - Women's)7/-14Down7001533,778N/AN/A30D Pertex QuantumNoNoYesAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 inNo
Feathered Friends Eos8/-13Down9001053,333N/AN/APertex QuantumNoNoYesAll RoundRegular306 g / 10.8 oz?No
Patagonia Macro Puff (Men's - Women's)8/-13ReviewSyntheticN/AN/AN/APlumaFill135 + 90 g10D Recycled nylon ripstopNoNoNoAll RoundRegular435 g / 15.3 oz79 cm / 31 inYes
Arc'teryx Macai Lightweight (aka LT) (Men's)8/-13Shell750491,296Coreloft Compact60 g/m²N40p-X 3L Gore-TexYes, zipsNoNoSki/SnowboardRegular855 g / 1 lb 14.2 oz74 cm / 29.1 inNo
Patagonia Tres 3-in-1 (Men's - Women's)8/-13ReviewParka7001182,914N/AN/A5.5 oz polyesterNoNoNoAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 inNo
Arc'teryx Seyla (Women's)8/-13Parka750922,434N/AN/AArato 10NoYesNoAround TownRegular507 g / 1 lb. 1.9 oz.87 cm / 34.4 inYes
Arc'teryx Koda (Men's)8/-13ParkaN/AN/AN/ACoreloft80 + 140 g/m²N80p-X Gore-TexNoNoNoAround TownRegular720 g / 1 lb 9.4 oz75 cm / 29.5 inYes
Patagonia DAS (Men's - Women's)10/-12ReviewSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProNoYesYesAll RoundRegular555 g / 1 lb 3.6 oz84 cm / 33 inNo
Patagonia Vosque 3-in-1 (Women's)10/-12ReviewParkaN/AN/AN/AThermoLite100 g65% nylon, 35% polyesterNoNoNoAround TownRegular1.360 kg / 3 lb90 cm / 35.5 inNo
Arc'teryx Thorium (Men's - Women's)12/-11ReviewDown7501403,704Coreloft80 + 140 g/m²Arato 30NoYesYesAll RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 inNo
Patagonia City Storm Down (Men's - Women's)12/-11Parka7001914,716N/AN/A4.2 oz polyesterNoNoYesAll RoundRegular468 g / 16.5 oz91 cm / 36 inYes
Patagonia Jackson Glacier (Men's - Women's)12/-11ReviewDown7001413,482N/AN/A3.6 oz 50D polyesterNoYesNoAround TownRegular880 g / 1 lb 15 oz79 cm / 31 inNo
Arc'teryx Thorium AR 2020 (Men's - Women's)14/-10ReviewDown7501303,439Coreloft80 + 140 g/m²Arato 30NoNoYesAll RoundRegular490 g / 1 lb 1.3 oz72 cm / 28.3 inYes
Patagonia Fitz Roy (Men's - Women's)14/-10Down8001283,612N/AN/A20D NylonNoNoYesAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 inNo
Arc'teryx Sensa (Women's)14/-10ParkaN/AN/AN/ACoreloft Compact120 g/m²NP100d Gore-Tex 2LNoYesNoAround TownRelaxed785 g / 1 lb 11.7 oz86 cm / 34 inYes
Arc'teryx Ralle (Men's)14/-10ParkaN/AN/AN/ACoreloft120 g/m²N80p-X 2L Gore-TexNoYesNoAround TownRegular735 g / 1 lb 9.9 oz83 cm / 32.5 inNo
Patagonia Hi-Loft (Men's - Women's)14/-10ReviewDown6001773,746N/AN/A1.4 oz 30D polyesterNoNoYesAll RoundRegular540 g / 1 lb 3 oz76 cm / 30 inYes
Arc'teryx Coelle (Women's)14/-10ParkaN/AN/AN/ACoreloft80 + 140 g/m²40D 2L Gore-TexNoYesNoAround TownRegular?95 cm / 37.4 inNo
REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10Down8501203,598N/AN/APertex mini ripstop nylonNoNoYesAll RoundRegular340 g / 13.75 oz74 cm / 29.25 inNo
Arc'teryx Beta Insulated Coat (Women's)16/-9ReviewParkaN/AN/AN/ACoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexNoYesNoAround TownRegular600 g / 1 lb 5.2 oz86 cm / 34 inNo
Arc'teryx Atom Heavyweight (aka AR) (Men's - Women's)18/-8ReviewSyntheticN/AN/AN/ACoreloft Continuous120 g/m2 + 80 g/m2 + 60 g/m230D TyonoYes, meshNoNoAll RoundRegular475 g / 1 lb 74 cm / 29.1 inNo
Patagonia Downdrift (Men's - Women's)18/-8Down6002795,905N/AN/A4.2 oz polyesterNoNoNoAround TownRegular1.014 kg / 2 lb 3.8 oz?No
Arc'teryx Magnus (Men's)19/-7ParkaN/AN/AN/ACoreloft80 gN60p Gore-Tex 2LNoNoNoAround TownRegular690 g / 1 lb 8.3 oz83 cm / 32.5 inYes
Rab Infinity Microlight (Men's - Women's)19/-7Down7001463,605N/AN/A13D Gore-Tex InfiniumNoNoYesAll RoundRegular452 g / 15.9 oz74 cm / 29.1 inNo
Arc'teryx Proton Heavyweight (Men's - Women's)21/-6ReviewSyntheticN/AN/AN/ACoreloft100 g/m2 + 60 g/m2Fortius Air 50NoNoNoAll RoundRegular540 g / 1 lb 3 oz77 cm / 30.5 inNo
Arc'teryx Agrium (Men's - Women's)21/-6Down8501173,508N/AN/AAratoNoNoYesAll RoundRegular365 g / 12.9 oz75 cm / 29.5 inYes
Arc'teryx Beta Insulated (Men's - Women's)21/-6ReviewParkaN/AN/AN/ACoreloft Continuous80 g/m²2L 40D Gore-TexYes, zipsYesNoAll RoundRegular680 g / 1 lb 8 oz78.5 cm / 31 inNo
Arc'teryx Patera (Women's)21/-6ReviewParka750671,773Coreloft60 + 80 g/m²2L Gore-TexNoYesNoAround TownTrim867 g / 1 lb 14.6 oz99 cm / 39 inNo
Patagonia Topley (Men's)23/-5Down7001724,247N/AN/A6 oz polyesterNoYesNoAll RoundRegular1.133 kg / 2 lb 8 oz77 cm / 30.5 inNo
Arc'teryx Alpha IS (Men's)23/-5SyntheticN/AN/AN/ACoreloft Continuous65 g/m²N40p-X 2L Gore-TexNoYesYesClimbingRegular610 g / 1 lb 5.5 oz78 cm / 30.75 inYes
Patagonia Down Sweater (Men's - Women's)23/-5ReviewDown8001504,233N/AN/A1.4 oz 20x30D polyesterNoNoYesAll RoundRegular428 g / 15.1 oz67 cm / 26.25 inNo
Arc'teryx Epsilon (Men's)26/-3SyntheticN/AN/AN/ACoreloft Compact80 g/m²Fortius 1.0NoNoNoAround TownRegular644 g / 1 lb 6.7 oz?No
Patagonia Silent Down (Men's - Women's)26/-3ReviewDown7001092,691N/AN/A2.2 oz polyesterNoNoNoAround TownRegular585 g / 1 lb 4.7 oz74 cm / 29 inNo
Arc'teryx Therme Insulated (Men's)26/-3ReviewSyntheticN/AN/AN/ACoreloft Compact40 g/m²2L Gore-TexNoNoNoAround TownRegular960 g / 2 lb 1.9 oz73 cm / 28.75 inYes
Arc'teryx Cerium (aka LT) (Men's - Women's)26/-3ReviewDown8501133,388Coreloft80 + 100 g/m²Arato 15NoNoYesAll RoundTrim335 g / 11.8 oz72 cm / 28.3 inNo
Mountain Hardwear GW/2 (Men's - Women's)28/-2Down800852,399N/AN/A10D Ripstop NylonNoNoYesAll RoundTrim250 g / 8.8 oz70 cm / 27.5 inNo
Arc'teryx Cerium LT 2020 (Men's - Women's)28/-2ReviewDown8501023,058Coreloft80 + 100 g/m²Arato 10NoNoYesAll RoundTrim305 g / 10.8 oz72 cm / 28.3 inYes
Arc'teryx Nuclei (aka FL) (Men's - Women's)32/0ReviewSyntheticN/AN/AN/ACoreloft Continuous65 g/m²Arato 10rNoNoYesAll RoundRegular325 g / 11.5 oz75 cm / 29.5 inNo
Patagonia DAS Light (Men's - Women's)34/1ReviewSyntheticN/AN/AN/APlumaFill65 g10D Pertex Quantum ProNoYesYesAll RoundRegular320 g / 11.3 oz77 cm / 30.5 inNo
Patagonia Isthmus (Men's)36/2ParkaN/AN/AN/AThermoGreen60 g4.2 oz polyesterNoNoNoAround TownRegular895 g / 1 lb 15.6 oz70 cm / 27.5 inNo
Patagonia AlpLight (Men's - Women's)36/2Down8001002,822N/AN/A0.8 oz 10D polyesterNoNoYesAll RoundSlim270 g / 9.5 oz74 cm / 29 inNo
Arc'teryx Proton (aka LT) (Men's - Women's)37/3ReviewSyntheticN/AN/AN/ACoreloft Compact80 g/m2 + 60 g/m2Fortius Air 20NoNoNoClimbingTrim375 g / 13.2 oz75 cm / 29.4 inNo
Patagonia Nano Puff (Men's - Women's)37/3ReviewSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco60 g22D PolyesterNoNoYesAll RoundRegular363 g / 12.8 oz71.5 cm / 28 inNo
Arc'teryx Norvan SL Ins. (Men's - Women's)39/4ShellN/AN/AN/ACoreloft Compact40 g/m²Gore-Tex ShakeDryNoNoYesRunningTrim270 g / 9.5 oz71.5 cm / 28.1 inYes
Patagonia Micro Puff (Men's - Women's)41/5ReviewSyntheticN/AN/AN/APlumaFill65 gPertex QuantumNoNoYesAll RoundRegular298 g / 10.5 oz75 cm / 29.5 inNo
Patagonia Nano Air (Men's - Women's)41/5ReviewSyntheticN/AN/AN/AFullRange60 g33D nylon ripstopNoNoYesAll RoundTrim318 g / 11.2 oz?No
Arc'teryx Atom (aka LT) (Men's - Women's)43/6ReviewSyntheticN/AN/AN/ACoreloft Continuous60 g/m²20D TyonoYes, meshNoNoAll RoundTrim375 g / 13.2 oz74 cm / 29.1 inNo
Arc'teryx Cerium Lightweight (aka SL) (Women's)43/6ReviewDown850581,739Coreloft40 + 100 g/m²Arato 7NoNoYesAll RoundTrim215 g / 7.6 oz69 cm / 27.2 in No
Arc'teryx Cerium Hybrid (Men's)44/7Down850441,319Coreloft40 + 100 g/m²Arato 15 + Fortius Air 50NoNoYesAll RoundTrim260 g / 9.2 oz70 cm / 27.5 inNo
Arc'teryx Proton Hybrid (Men's - Women's)46/8ReviewSyntheticN/AN/AN/ACoreloft Compact40 g/m²Fortius Air 50NoNoNoAll RoundTrim365 g / 12.9 oz76 cm / 30 inNo
Arc'teryx Proton Lightweight (aka FL) (Men's - Women's)48/9ReviewSyntheticN/AN/AN/AOcta Loft94 g/m²Fortius Air 20NoNoNoClimbingTrim343 g / 12.1 oz75 cm / 29.5 inNo
Patagonia Nano Air Light Hybrid (Men's - Women's)50/10SyntheticN/AN/AN/AFullRange40 g20D nylon ripstopNoNoNoAll RoundTrim335 g / 11.8 oz?No
Arc'teryx Atom Lightweight (aka SL) (Men's - Women's)52/11ReviewSyntheticN/AN/AN/ACoreloft Compact40 g/m²20D TyonoYes, meshNoNoAll RoundTrim270 g / 9.5 oz72 cm / 28.3 inNo
 

Assumptions: Worn over a thin shirt, no output, no precipitation, light to no wind. Values are always for size M and for men's, except for women's-only items. 

Primary use of this spectrum is for comparison, rather than figuring out absolute temp ratings. 

  • Performance ratings of Arc'teryx synthetics

NameEst. Temp (F/C)BreathabilityWind Res.Abrasion res.ReviewTypeSynthetic FillSynth. Fill WeightFace FabricPit venting?Two way zipper?Stuffs into itself?ActivityFitWeightLength (CB)Internal pocketsExternal pockets
Arc'teryx Alpha (Men's - Women's)-18/-28No dataNo dataNo dataReviewDownCoreloft90 g/m²N30r 2L GoreTex InfiniumNoYesYesClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 inNo
Feathered Friends Khumbu-17/-27No dataNo dataNo dataDownPrimaloft Gold200 gPretex Shield XTNoNoYesAll RoundRegular960 g / 2 lb 2 oz?No
Arc'teryx Ceres SV (Men's - Women's)-15/-26No dataNo dataNo dataReviewDownCoreloft?Arato 30NoYesYesAll RoundRegular880 g / 1 lb 15 oz86 cm / 34 inYes
Mountain Equipment K7 (Men's)-13/-25No dataNo dataNo dataDownN/AN/A30D DriliteNoYesYesAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 inNo
Rab Positron Pro (Men's)-13/-25No dataNo dataNo dataDownN/AN/A40D Pertex Quantum ProNoYesYesAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 inNo
Arc'teryx Therme SV (Men's)-11/-24No dataNo dataNo dataReviewParkaCoreloft60 g/m²2L Gore-TexNoYesNoAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 inNo
Patagonia Grade VII-11/-24No dataNo dataNo dataDownN/AN/A1.2 oz 15 & 20D Pertex QuantumNoYesNoAround TownRegular743 g / 1 lb 10.1 oz83 cm / 32.5 inYes
Patagonia AlpLoft (Men's - Women's)-10/-23No dataNo dataNo dataDownN/AN/APertex QuantomNoYesYesAll RoundRegular680 g / 1 lb 8 oz81 cm / 31.8 inNo
Arc'teryx Firebee AR (Men's - Women's)-10/-238/1010/10No dataReviewDownN/AN/AArato 7 & 10NoYesYesAll RoundRegular680 g / 1 lb 8 oz79 cm / 31 inYes
Mountain Equipment Exo (Men's)-10/-23No dataNo dataNo dataDownN/AN/ANylonNoYesYesAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 inNo
Arc'teryx Thorsen (Men's)-7/-22No dataNo dataNo dataReviewParkaCoreloft60 g/m²90D 2L Gore-TexNoYesNoAround TownRegular1.1 kg / 2 lb 5.4 oz91 cm / 36 inYes
Patagonia Frozen Range (Men's - Women's)-6/-21No dataNo dataNo dataReviewParkaN/AN/A4 oz 75-denier polyesterNoNoNoAround TownRegular1.253 kg / 2 lb 12.2 oz84 cm / 33 inYes
Mountain Equipment Li. Ec. (Men's - Women's)-5/-20No dataNo dataNo dataDownN/AN/A50D DriliteNoYesNoAll RoundRegular822 g / 1 lb 13 oz72 cm / 28 inYes
Arc'teryx Thorium Parka (Women's)-2/-19No dataNo dataNo dataReviewDownCoreloft80 + 140 g/m²Arato 20NoYesNoAround TownRegular610 g / 1 lb 5.5 oz115.8 cm / 45.6 inNo
Rab Neutrino Pro (Men's - Women's)-2/-19No dataNo dataNo dataDownN/AN/A20D Pertex Quantum ProNoYesYesAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 inNo
Arc'teryx Patera Long (Women's)0/-18No dataNo dataNo dataParkaCoreloft60 + 80 g/m²2L Gore-TexNoYesNoAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 inNo
Patagonia Stormshadow (Men's)0/-18No dataNo dataNo dataParkaN/AN/A75D PolyesterNoNoNoAround TownRegular1.182 kg / 2 lb 9.7 oz?No
Arc'teryx Beta Down Insulated (Men's)0/-18No dataNo dataNo dataParkaCoreloft80 g/m²2L 40D Gore-TexYesYesNoAll RoundRegular760 g / 1 lb 10.8 oz79 cm / 31 inNo
Arc'teryx Dually Belay (Men's)0/-18No dataNo dataNo dataReviewSyntheticThermaTek92 g/m²30D NylonNoYesYesAround TownRegular705 g / 1 lb 9 oz84 cm / 33 inYes
Arc'teryx Centrale (Women's)0/-18No dataNo dataNo dataReviewParkaCoreloft60 g/m²N90p NylonNoYesNoAround TownRegular885 g / 1 lb 15.2 oz95 cm / 37.5 inYes
Arc'teryx Thorium SV Parka (Men's)0/-18No dataNo dataNo dataDownCoreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumNoYesNoAround TownRegular685 g / 1 lb 8.2 oz85 cm / 33.5 inNo
Arc'teryx Camosun (Men's)0/-18No dataNo dataNo dataReviewParkaCoreloft140 g/m²N150p-X Gore-TexNoNoNoAround TownTrim960 g / 2 lb 1.9 oz80 cm / 31.5 inYes
Arc'teryx Cerium SV (Men's - Women's)0/-18No dataNo dataNo dataReviewDownCoreloft80 + 140 g/m²Arato 7 & 10NoNoYesAll RoundRegular415 g / 14.6 oz69.5 cm / 27.4 inYes
Arc'teryx Liatris Parka (Women's)2/-17No dataNo dataNo dataParkaClimashield80 g/m2 + 60 g/m270D 3L Gore-TexNoNoNoAround TownRegular1.093 kg / 2 lb 6.6 oz109 cm / 43 inNo
Arc'teryx Revet (Men's)2/-17No dataNo dataNo dataParkaN/AN/A20d nylon/spandex double weaveNoYesNoAround TownRegular755 g / 1 lb 10.6 oz91 cm / 36 inYes
Arc'teryx Thorium SV (Men's)3/-16No dataNo dataNo dataDownCoreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumNoYesYesAround TownRegular645 g / 1 lb 6.8 oz73 cm / 28.75 inNo
Arc'teryx Piedmont (Men's)3/-16No dataNo dataNo dataParkaN/AN/AArato 10NoYesYesAround TownRegular515 g / 1 lb 2.2 oz82 cm / 32.25 inYes
Outdoor Research Sup. Alp. (Men's - Women's)3/-16No dataNo dataNo dataDownN/AN/A30D Pertex Quantum ProNoYesNoAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 inNo
Arc'teryx Fission SV (Men's - Women's)3/-163/10No dataNo dataReviewSyntheticCoreloft Continuous90 + 65 g/m²N80p-X Gore-Tex 2LNoYesNoAll RoundRegular890 g / 1 lb 15.4 oz81 cm / 31.8 inYes
Arc'teryx Alessa Long3/-16No dataNo dataNo dataParkaCoreloft80 + 120 g/m²N90p 2L Gore-TexNoNoNoAround TownRegular1.015 kg / 2 lb 3.8 oz123 cm / 48.5 inYes
Arc'teryx Radsten Parka (Men's)3/-16No dataNo dataNo dataParkaCoreloft Compact120 g/m²NP100d Gore-Tex 2LNoNoNoAround TownRegular745 g / 1 lb 10.3 oz82 cm / 32.25 inYes
Rab Electron Pro (Men's - Women's)5/-15No dataNo dataNo dataDownN/AN/A20D Pertex Quantum ProNoYesYesAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 inNo
Rab Infinity Alpine (Men's)5/-15No dataNo dataNo dataDownN/AN/A30D & 13D Gore-Tex InfiniumNoYesYesAll RoundRegular551 g / 1 lb 3.4 oz76.5 cm / 30.1 inNo
Arc'teryx Alpha Lightweight (Men's - Women's)5/-15No dataNo dataNo dataDownCoreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumNoYesYesClimbingRegular540 g / 1 lb 3 oz79.5 cm / 31.25 inNo
Arc'teryx Therme Parka (Men's)5/-15No dataNo dataNo dataReviewParkaCoreloft60 + 80 g/m²P75d PolyesterNoYesNoAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 inNo
Arc'teryx Liatris (Women's)5/-15No dataNo dataNo dataParkaClimashield80 g/m2 + 60 g/m270D 3L Gore-TexNoNoNoAround TownRegular890 g / 1 lb 15.4 oz75 cm / 29.5 inNo
Arc'teryx Macai (Men's)5/-15No dataNo dataNo dataReviewShellCoreloft Compact60 + 100 g/m²N40p-X 3L Gore-TexYes, zipsNoNoSki/SnowboardRegular1 kg / 2 lb 4 oz76 cm / 30 inNo
Arc'teryx Nuclei SV (Men's - Women's)5/-151/1010/102/10ReviewSyntheticCoreloft Continuous190 g/m2 + 90 g/m2Arato 15NoYesYesAll RoundRegular600 g / 1 lb 5.2 oz81 cm / 31.8 inNo2x dump1x chest
Black Diamond Access Down (Men's - Women's)7/-14No dataNo dataNo dataDownN/AN/A30D ripstop nylonNoYesYesAll RoundRegular442 g / 15.6 oz76 cm / 29.75 inNo
Arc'teryx Kappa (Men's)7/-14No data9/109/10ReviewSyntheticCoreloft Continuous140 g/m²N70p Gore ThermiumNoYesNoAll RoundRegular755 g / 1 lb 10.6 oz80 cm / 31.5 inYes
Patagonia Jackson Glacier Parka (Men's - Women's)7/-14No dataNo dataNo dataParkaN/AN/A50D PolyesterNoNoNoAround TownRegular1.142 kg / 2 lb 8.3 oz?No
Arc'teryx Prema Down Coat (Women's)7/-14No dataNo dataNo dataParkaN/AN/ANylonNoYesNoAround TownRegular794 g / 1 lb 12 oz117 cm / 46.1 inYes
Arc'teryx Radsten Insulated (Men's)7/-14No dataNo dataNo dataParkaCoreloft Compact120 g/m²NP100d Gore-Tex 2LNoNoNoAround TownRegular715 g / 1 lb 9.2 oz73 cm / 28.75 inYes
Rab Microlight Alpine (Men's - Women's)7/-14No dataNo dataNo dataDownN/AN/A30D Pertex QuantumNoNoYesAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 inNo
Feathered Friends Eos8/-13No dataNo dataNo dataDownN/AN/APertex QuantumNoNoYesAll RoundRegular306 g / 10.8 oz?No
Patagonia Macro Puff (Men's - Women's)8/-13No dataNo dataNo dataReviewSyntheticPlumaFill135 + 90 g10D Recycled nylon ripstopNoNoNoAll RoundRegular435 g / 15.3 oz79 cm / 31 inYes
Arc'teryx Macai Lightweight (aka LT) (Men's)8/-13No dataNo dataNo dataShellCoreloft Compact60 g/m²N40p-X 3L Gore-TexYes, zipsNoNoSki/SnowboardRegular855 g / 1 lb 14.2 oz74 cm / 29.1 inNo
Patagonia Tres 3-in-1 (Men's - Women's)8/-13No dataNo dataNo dataReviewParkaN/AN/A5.5 oz polyesterNoNoNoAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 inNo
Arc'teryx Seyla (Women's)8/-13No dataNo dataNo dataParkaN/AN/AArato 10NoYesNoAround TownRegular507 g / 1 lb. 1.9 oz.87 cm / 34.4 inYes
Arc'teryx Koda (Men's)8/-13No dataNo dataNo dataParkaCoreloft80 + 140 g/m²N80p-X Gore-TexNoNoNoAround TownRegular720 g / 1 lb 9.4 oz75 cm / 29.5 inYes
Patagonia DAS (Men's - Women's)10/-121/109/103/10ReviewSyntheticPrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProNoYesYesAll RoundRegular555 g / 1 lb 3.6 oz84 cm / 33 inNo2x dump1x chest
Patagonia Vosque 3-in-1 (Women's)10/-12No dataNo dataNo dataReviewParkaThermoLite100 g65% nylon, 35% polyesterNoNoNoAround TownRegular1.360 kg / 3 lb90 cm / 35.5 inNo
Arc'teryx Thorium (Men's - Women's)12/-11No dataNo dataNo dataReviewDownCoreloft80 + 140 g/m²Arato 30NoYesYesAll RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 inNo
Patagonia City Storm Down (Men's - Women's)12/-11No dataNo dataNo dataParkaN/AN/A4.2 oz polyesterNoNoYesAll RoundRegular468 g / 16.5 oz91 cm / 36 inYes
Patagonia Jackson Glacier (Men's - Women's)12/-11No dataNo dataNo dataReviewDownN/AN/A3.6 oz 50D polyesterNoYesNoAround TownRegular880 g / 1 lb 15 oz79 cm / 31 inNo
Arc'teryx Thorium AR 2020 (Men's - Women's)14/-10No dataNo dataNo dataReviewDownCoreloft80 + 140 g/m²Arato 30NoNoYesAll RoundRegular490 g / 1 lb 1.3 oz72 cm / 28.3 inYes
Patagonia Fitz Roy (Men's - Women's)14/-10No dataNo dataNo dataDownN/AN/A20D NylonNoNoYesAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 inNo
Arc'teryx Sensa (Women's)14/-10No dataNo dataNo dataParkaCoreloft Compact120 g/m²NP100d Gore-Tex 2LNoYesNoAround TownRelaxed785 g / 1 lb 11.7 oz86 cm / 34 inYes
Arc'teryx Ralle (Men's)14/-10No dataNo dataNo dataParkaCoreloft120 g/m²N80p-X 2L Gore-TexNoYesNoAround TownRegular735 g / 1 lb 9.9 oz83 cm / 32.5 inNo
Patagonia Hi-Loft (Men's - Women's)14/-10No dataNo dataNo dataReviewDownN/AN/A1.4 oz 30D polyesterNoNoYesAll RoundRegular540 g / 1 lb 3 oz76 cm / 30 inYes
Arc'teryx Coelle (Women's)14/-10No dataNo dataNo dataParkaCoreloft80 + 140 g/m²40D 2L Gore-TexNoYesNoAround TownRegular?95 cm / 37.4 inNo
REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10No dataNo dataNo dataDownN/AN/APertex mini ripstop nylonNoNoYesAll RoundRegular340 g / 13.75 oz74 cm / 29.25 inNo
Arc'teryx Beta Insulated Coat (Women's)16/-9No dataNo dataNo dataReviewParkaCoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexNoYesNoAround TownRegular600 g / 1 lb 5.2 oz86 cm / 34 inNo
Arc'teryx Atom Heavyweight (aka AR) (Men's - Women's)18/-84/108/108/10ReviewSyntheticCoreloft Continuous120 g/m2 + 80 g/m2 + 60 g/m230D TyonoYes, meshNoNoAll RoundRegular475 g / 1 lb 74 cm / 29.1 inNo1x chest-
Patagonia Downdrift (Men's - Women's)18/-8No dataNo dataNo dataDownN/AN/A4.2 oz polyesterNoNoNoAround TownRegular1.014 kg / 2 lb 3.8 oz?No
Arc'teryx Magnus (Men's)19/-7No dataNo dataNo dataParkaCoreloft80 gN60p Gore-Tex 2LNoNoNoAround TownRegular690 g / 1 lb 8.3 oz83 cm / 32.5 inYes
Rab Infinity Microlight (Men's - Women's)19/-7No dataNo dataNo dataDownN/AN/A13D Gore-Tex InfiniumNoNoYesAll RoundRegular452 g / 15.9 oz74 cm / 29.1 inNo
Arc'teryx Proton Heavyweight (Men's -