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Arc’teryx Thorium Review

Last updated: November 14, 2022 by

  • This article is revised after Arc'teryx FW23 update. 

The name of Thorium AR has been changed to Thorium for winter 2023. There has also been some design updates: 

  • A two way zipper is added, which to me is the main (and the strangest) highlight, 
  • An external chest pocket is added, 
  • Fit is now a little bit baggier, 
  • Baffles are a bit larger (see image below), 
  • Hood is now helmet compatible, 
  • Amount of 750 FP down is increased from 130 grams to 140 grams,
  • Made more eco-friendly. 

There has also been subtle changes in the weight (slight increase) and center back length (slight decrease). Check out the jackets database table below for more details about them. 

Thorium Parka is also just in! Here's the Thorium vs Thorium Parka vs Thorium AR side-by-side comparison page on arcteryx.com: https://arcteryx.com/us/en/compare/X000006585-bitters/X000006919-black/X000006972-figment

Arc'teryx Thorium vs Thorium AR. I loved the 24k black color of Thorium AR a lot. Click on image to visit the new Thorium Hoody page on arcteryx.com. 

Even if Arc'teryx decides to discontinue the Thorium AR in the future, its second hand will live pretty long because of its popularity and durability. 

Summary

Arc'teryx Thorium is a fantastic, warm down jacket for casual use in dry areas. It's comfortable, light, stuffs into itself and is even equipped with a two way zipper. 

I wouldn't recommend it for damp areas at all though. Because it soaks water like a sponge (as all down jackets do). Don't think about it for high output activities either (fragile face fabric and poor breathability). 

FYI, Thorium isn't the only down jacket line Arc'teryx offers. There's the Cerium line, too - which is a lighter and less warm alternative to it. 

Links: 

Warmth

Thorium is pretty warm, especially for its weight. This isn't surprising news for any down jacket as they offer incredible warmth to weight ratio. 

Check out its temperature rating below: 

  • 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/-28NoYesYesDown850296251,600Coreloft90 g/m²GoreTex 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
NameActivityTemp (F/C)BreathabilityWeather Res.DurabilityPackabilityMeasurementsReviewPit zips?Stuffs into itself?Two way zipper?Hood?Face FabricFitWeightLength
Alpha FL (Men's - Women's)ClimbingN/A4/105/106/1010/10[Men's / Women's]NoYesNoStormHoodHadron 3L Gore-TexTrim209 g / 7.4 oz76.5 cm / 30 in
Alpha SL (Men's - Women's)ClimbingN/A3/104/106/109/10[Men's / Women's]NoYesNoStormHoodN40p 3L Gore-TexTrim326 g / 11.5 oz77.5 cm / 30.5 in
Alpha AR (Men's - Women's)ClimbingN/A8/107/108/104/10[Men's]ReviewYesNoNoStormHoodN40d & N80d Most Rugged 3L Gore-Tex ProRegular430 g / 15.2 oz79.5 cm / 31.25 in
Alpha SV (Men's - Women's)ClimbingN/A8/1010/1010/103/10[Men's]ReviewYesNoNoStormHoodN100d Most Rugged 3L Gore-Tex ProRegular510 g / 1 lb 2 oz78 cm / 30.75 in
Alpha IS (Men's)Climbing23/-57/105/105/108/10NoYesYesStormHoodN40p-X 2L Gore-TexRegular610 g / 1 lb 5.5 oz78 cm / 30.75 in
Beta (Men's - Women's)All RoundN/A5/105/104/105/10NoNoNoStormHoodN30p-X 3L Gore-TexFitted300 g / 10.6 oz76 cm / 30 in
Beta Long (Men's)All RoundN/A5/108/108/103/10ReviewNoNoNoStormHoodN80p 3L Gore-TexRegular441 g / 15.6 oz85 cm / 33.5 in
Beta Coat (Women's)All RoundN/A7/105/104/105/10[Men's / Women's]NoNoYesStormHood3L Gore-TexRegular320 g / 11.3 oz?
Beta LT Hadron (Men's - Women's)All RoundN/A5/105/104/105/10NoNoNoStormHoodHadron 3L Gore-TexFitted255g / 9 oz76 cm / 30 in
Beta LT (Men's - Women's)All RoundN/A8/107/108/105/10ReviewYesNoNoStormHoodN40d 3L Gore-TexFitted395 g / 13.9 oz76 cm / 30 in
Beta Insulated (Men's - Women's)All Round21/-610/104/104/102/10[Men's / Women's]YesNoYesStormHoodN40d 2L Gore-TexRegular680 g / 1 lb 8 oz78.5 cm / 31 in
Beta Insulated Coat (Women's)All Round16/-97/104/104/102/10[Men's / Women's]NoNoYesStormHoodN40d 2L Gore-TexRegular600 g / 1 lb 5.2 oz?
Beta AR (Men's - Women's)All RoundN/A8/108/108/104/10ReviewYesNoNoDropHoodN40r-X & N80p-X Most Rugged 3L Gore-Tex ProRegular460 g / 1 lb 76 cm / 30 in
Beta SV (Men's - Women's)All RoundN/A8/1010/109/103/10[Men's / Women's]ReviewYesNoNoStormHoodN80p-X Most Rugged 3L Gore-Tex ProRegular495 g / 1 lb 1.5 oz79 cm / 31 in
Alpine Guide (Men's - Women's)All RoundN/A8/1010/109/103/10[Men's]YesNoNoStormHoodN80d-X Most Rugged 3L Gore-Tex ProRegular480g / 1 lb 0.9 oz?
Gamma SL (Men's - Women's)All RoundN/A6/102/106/105/10[Men's / Women's]ReviewNoNoNoStormHoodFortius 1.0Trim310 g / 10.9 oz74 cm / 29.1 in
Gamma LT (Men's)All RoundN/A6/103/107/103/10[Men's / Women's]ReviewNoNoNoStormHoodWee BurlyRegular545 g / 1 lb 3.2 oz76 cm / 30 in
Gamma MX (Men's - Women's)All RoundN/A5/104/108/103/10[Men's / Women's]ReviewNoNoNoStormHoodFortius 2.0Regular555 g / 1 lb 3.6 oz74 cm / 29.1 in
Rush (Men's - Women's)SkiingN/A8/109/109/103/10[Men's]ReviewYesNoNoStormHoodN80p-X & N100p-X 3L Most Rugged Gore-Tex ProRegular590 g / 1 lb 4.8 oz79.5 cm / 31.25 in
Sabre (Men's)SkiingN/A8/108/108/102/10YesNoNoStormHoodN80p-X 3L Gore-TexRegular705 g / 1 lb 8.9 oz79 cm / 31 in
Sentinel (Women's)SkiingN/A8/108/108/102/10YesNoNoStormHoodN70p 3L Gore-TexRegular370 g / 13.1 oz?
Macai (Men's)Skiing5/-159/108/109/101/10ReviewYesNoNoDropHoodN40p-X 3L Gore-TexRegular1 kg / 2 lb 3.3 oz75 cm / 29.5 in
Macai LT (Men's)Skiing8/-138/107/108/101/10[Men's]YesNoNoStormHoodN40p-X 3L Gore-TexRegular855 g / 1 lb 14.2 oz?
Andessa (Women's)Skiing8/-138/10TestingTesting1/10YesNoNoDropHoodN40d 3L Gore-TexTrim869 g / 1 lb 14.7 oz?
Andessa Shell (Women's)SkiingN/A5/10TestingTesting3/10NoNoNoDropHoodN70p 3L Gore-TexTrim560 g / 1 lb 3.8 oz?
Theriss Down (Women's)SkiingTesting8/106/107/102/10YesNoNoStormHoodN80p 2L Gore-TexRegular709 g / 1 lb 9 oz?
Rush IS (Women's)Skiing16/-95/10TestingTesting9/10NoYesNoStormHoodGore-Tex InfiniumRegular515 g / 1 lb 2.2 oz?
Sentinel IS (Women's)Skiing21/-6TestingTestingTestingTesting[Women's]YesNoNoStormHoodN80p 2L Gore-TexRegular600 g / 1 lb 5.2 oz?
Ski Guide (Men's - Women's)SkiingN/ATestingTestingTestingTestingYesNoNoDropHoodN80d Most Rugged 3L Gore-Tex ProRegular570 g / 1 lb 4.1 oz?
Micon HeatherSkiingN/ATestingTestingTestingTesting[Men's]YesNoNoStormHoodNP100-d 3L Gore-TexRegular685 g / 1 lb 8.2 oz83 cm / 32.5 in
Micon (Men's)SkiingN/ATestingTestingTestingTesting[Men's]YesNoNoStormHoodN80p 3L Gore-TexRegular685 g / 1 lb 8.2 oz83 cm / 32.5 in
Cassiar (Men's)SkiingN/A8/107/108/103/10[Women's]ReviewYesNoNoDropHoodN70p 3L Gore-TexTrim820 g / 1 lb 12.9 oz74.5 cm / 29.3 in
Cassiar LT (Men's)SkiingN/A6/106/106/105/10[Women's]ReviewYesNoNoDropHoodN70p 3L Gore-TexTrim605 g / 1 lb 5.3 oz75 cm / 29.5 in
Ravenna (Women's)SkiingN/A8/107/108/103/10[Men's]ReviewYesNoNoDropHoodN70s-4 3L Gore-TexTrim725 g / 1 lb 9.6 oz69.5 cm / 27.4 in
Ravenna LT (Women's)SkiingN/A6/106/106/105/10[Men's]ReviewYesNoNoDropHoodN70p 3L Gore-TexTrim540 g / 1 lb 3 oz69 cm / 27.2 in
Procline (Men's)SkiingN/ATestingTestingTestingTesting[Women's]YesNoNoStormHoodN70p Gore-Tex InfiniumTrim720 g / 1 lb 9.4 oz76 cm / 30 in
Shashka Stretch (Women's)SkiingN/ATestingTestingTestingTesting[Women's]YesNoNoStormHoodN70p Gore-Tex InfiniumTrim670 g / 1 lb 7.6 oz71 cm / 28 in
Sabre AR (Men's)SkiingN/A7/108/107/107/10[Men's]ReviewYesNoNoStormHoodN70p 3L Gore-TexRegular700 g / 1 lb 8.7 oz79 cm / 31 in
Sentinel AR (Women's)SkiingN/A7/108/107/107/10[Women's]ReviewYesNoNoStormHoodN70p 3L Gore-TexRegular590 g / 1 lb 4.8 oz72.5 cm / 28.5 in
Sabre LT (Men's)SkiingN/A7/108/107/108/10ReviewYesNoNoStormHoodN80p 3L Gore-TexRegular660 g / 1 lb 7.3 oz83 cm / 32.5 in
Sentinel LT (Women's)SkiingN/A7/108/107/108/10ReviewYesNoNoStormHoodN80p 3L Gore-TexRegular565 g / 1 lb 3.9 oz73.5 cm / 29 in
Incendia (Women's)SkiingN/A8/109/109/103/10[Women's]ReviewYesNoNoStormHoodNP100d 3L Gore-TexTrim610 g / 1 lb 5.5 oz79 cm / 31 in
Indencia ISSkiingTestingTestingTestingTestingTesting[Men's / Women's]YesNoNoStormHoodN80p 2L Gore-TexRegular?78 cm / 30.75 in
Norvan LT (Men's - Women's)RunningN/A5/105/106/106/10[Women's]NoNoNoStandardN13p 3L Gore-TexFitted190 g / 6.7 oz?
Squamish (Men's - Women's)RunningN/A5/105/107/109/10[Women's]ReviewNoYesNoStormHood30D TyonoTrim140 g / 4.9 oz77.5 cm / 30.5 in
Norvan SL Ins. (Women's)Running39/4TestingTestingTestingTesting[Women's]NoYesNoStandardGore-Tex ShakeDryTrim270 g / 9.5 oz71.5 cm / 28.1 in
Cita (Women's)RunningN/A7/104/105/1010/10[Men's]ReviewNoYesNoStandardLuminTrim120 g / 4.2 oz67.5 cm / 26.5 in
Cita SL (Women's)RunningN/A7/104/104/1010/10[Men's]ReviewYesYesNoStandardPermeair 20Trim65 g / 2.3 oz61.5 cm / 24.2 in
Incendo (Men's)RunningN/A7/104/105/1010/10ReviewNoYesNoStandardLuminTrim125 g / 4.4 oz?
Incendo SL (Men's)RunningN/A7/104/104/1010/10[Men's / Women's]ReviewNoYesNoStandardPermair 20 & CanimTrim80 g / 2.8 oz73 cm / 28.75 in
Incendo AirshellRunningN/ATestingTestingTestingTesting[Men's]NoYesNoStandard????
Norvan SL (Men's - Women's)RunningN/A7/106/108/108/10[Women's]ReviewNoYesNoStandardGore-Tex InfiniumTrim120 g / 4.2 oz77 cm / 30.4 in
Trino SL (Men's)RunningN/A8/105/107/106/10[Men's / Women's]ReviewNoNoNoStandardGore-Tex InfiniumTrim340 g / 12 oz74 cm / 29.1 in
Trino SL Anorak (Women's)RunningN/A8/107/108/107/10[Men's / Women's]ReviewNoNoNoStandardGore-Tex InfiniumTrim290 g / 10.2 oz65 cm / 25.5 in
Nodin (Men's - Women's)RunningN/A8/105/105/1010/10[Men's / Women's]NoYesNoStandard20D TyonoTrim155 g / 5.5 oz75 cm / 29.5 in
Solano (Men's - Women's)Around TownN/ATestingTestingTestingTestingReviewNoNoNoStandardGore-Tex InfiniumRelaxed355 g / 12.5 oz72 cm / 28.3 in
Venda Anorak (Women's)Around TownN/ATestingTestingTestingTestingNoNoNoStandardGore-TexRelaxed255 g / 9 oz75.5 cm / 29.7 in
Zeta FL (Men's - Women's)HikingN/A4/106/104/106/10[Men's / Women's]NoNoNoStormHoodN20r 2L Gore-TexTrim221 g / 7.8 oz76 cm / 30 in
Zeta SL (Men's - Women's)HikingN/A3/105/104/105/10[Men's]ReviewNoNoNoStormHood2L Gore-TexTrim310 g / 10.9 oz77.8 cm / 30.6 in
Zeta LT (Men's - Women's)HikingN/A5/107/108/105/10[Men's]NoNoNoStormHoodN40P-X 3L Gore-TexTrim335 g / 11.8 oz78 cm / 30.75 in
Zeta AR (Men's)HikingN/A7/108/107/104/10YesNoNoStormHood3L Gore-TexRegular425 g / 15 oz80 cm / 31.5 in

When it gets soaked in water (e.g use under precipitation), not only it lets the water in, but it also loses insulating power. That's because down provides warmth by trapping air in its vacant spots, and water, as you can guess, interferes with that mechanism. 

If you'd like to read more about the working principles of down insulated jackets (or synthetic insulated jackets for that matter) check out this article: https://outdoorcrunch.com/jackets/ 

In addition to down, Thorium is also insulated with Coreloft, a synthetic insulator made by Arc'teryx. Just like all synthetic insulators, Coreloft too is much more weather resistant compared to down, and doesn't lose insulating capability under wet conditions. 

If you'd like to read more about Coreloft and other synthetic insulators as well as their working principles, check out the article https://outdoorcrunch.com/clo-values/ in addition to the article I've shared above. 

This brings me to the next point. 

Weather & abrasion resistance

The point of reinforcing a down jacket with synthetic insulators is to provide it at least a little bit of a weather resistance. Because no matter where you live, you don't want to be completely vulnerable to unexpected weather changes. ZERO protection against precipitation is usually unacceptable. 

Reinforcements made in Thorium accomplishes this pretty well. 

My girlfriend wearing my Thorium AR (which, as explained earlier, is NOT the most recent model) in Jokulsarlon, Iceland during late March (2022). On a side note, here's the article on our trip to Iceland. 

We experienced all sorts of snow, rain and drizzle (welcome to Iceland in March) and Thorium did a pretty good job in terms of withstanding it for, say, up to half an hour on average. 

If you need a much more weather resistant jacket with at least the same amount of warmth, then you must forget about down jackets. I'd recommend you to check out Nuclei SV (Men's) and Atom AR (Men's - Women's - read my review) in that case. 

In terms of wind resistance, it's solid and won't cause you any problems, although it's not as solid as wind-proofing focused jackets such as the Nuclei FL (Men's - Women's - read my review). 

Breathability

Thorium is the first of its kind in this regard. 

It's the first light-Arc'teryx-down-jacket that is EVER offered with a two way zipper. 

I've long been mad about Arc'teryx's approach on two way zippers, especially for men's counterparts (almost all of women's parkas offer one but this isn't the case for men's parkas, for example). 

I didn't expect a move like this. Thank you Arc'teryx! 

Now there is a downside to having a two way zipper. It tends to break more often and easily. But I don't see this being a problem unless you're planning to use the jacket for 5+ years. 

It also takes a bit more time to zip it up compared to the ordinary one way zippers. Especially if you have gloves. Two way zippers sometimes do feel annoying to me, but the breathability and comfort advantages also cannot be overlooked. 

I also say comfort in addition to breathability in here because being able to keep the only upper half of the jacket zipper and the lower half unzipped, it's so much more comfortable when sitting down. 

The comfort difference in this regard is much more apparent with the longer jackets (mainly parkas), so don't expect day and night kind of difference with the Thorium in this regard since it's a rather shorter jacket. 

Packability

I'm a big fan of jackets that stuff into themselves. 

See the size of my packed Thorium AR (far left - see image). A packed Nuclei FL, a Beats Studio 3 and an Osprey Farpoint 40 for scale. Cerium LT packed size would be close to Nuclei FL. 

One thing to keep in mind in here though is that stuffing and unstuffing a jacket tens of thousands of times can take a toll on its insulating power over time. The ideal way to store a jacket is to hang it. 

Links: 

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:

Complete list:

Synthetic Insulated Jackets

Down Jackets

Parkas

Shell Jackets

Ski Jackets

Fleece Jackets

Wind Jackets

Rain Jackets

Also see:

Thank you for reading!

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