Arc’teryx Atom AR vs LT

Last updated: January 18, 2025

Going from top to bottom: Atom SL (soon to be called Atom Lightweight), Atom (formerly LT) and Atom Heavyweight (formerly AR). Click on image to view their side-by-side comparison on arcteryx.com. 

I've got all Atoms. Including the new versions for Winter 2024 season. 

Summary

It's like comparing apples to oranges. 

Atom Hw is designed for stationary or low-output use at most. It's much warmer and wind resistant than Atom. 

Atom, on the other hand, is for high output activities. It provides much better breathability and mobility compared to Atom Hw. 

This, in my opinion, is what your decision should primarily be based on. 

Links: 

Also read: 

Warmth

There's one thing that makes Atom HW unique in terms of the distribution of insulation.

It might not be a game changer but I personally really like the idea. 

  • Temperature ratings of Arc'teryx jackets

NameEst. Temp (F/C)ReviewPit venting?Two way zipper?Stuffs into itself?TypeFill Power (in3/oz)Fill Weight (g)Fill Volume (in3)Synthetic FillSynth. Fill WeightFace FabricActivityFitWeightLength (CB)
Arc'teryx Alpha Parka (Men's - Women's)-18/-28ReviewNoYesYesDown8502968,875Coreloft90 g/m²N30r 2L GoreTex InfiniumClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 in
Arc'teryx Alpha Lightweight (Men's - Women's)5/-15NoYesYesDown8501173,508Coreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumClimbingRegular540 g / 1 lb 3 oz79.5 cm / 31.25 in
Arc'teryx Atom (aka 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 Atom Heavyweight (aka 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
Arc'teryx Atom Lightweight (aka SL) (Men's - Women's)52/11ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²20D TyonoAll RoundTrim270 g / 9.5 oz72 cm / 28.3 in
Arc'teryx Beta Down Insulated (Men's)0/-18YesYesNoParka8501263,778Coreloft80 g/m²2L 40D Gore-TexAll RoundRegular760 g / 1 lb 10.8 oz79 cm / 31 in
Arc'teryx Beta Insulated (Men's)21/-6ReviewYes, zipsYesNoParkaN/AN/AN/ACoreloft Continuous80 g/m²2L 40D Gore-TexAll RoundRegular680 g / 1 lb 8 oz78.5 cm / 31 in
Arc'teryx Beta Insulated Coat (Women's)16/-9ReviewNoYesNoParkaN/AN/AN/ACoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexAround TownRegular600 g / 1 lb 5.2 oz86 cm / 34 in
Arc'teryx Cerium (aka LT) (Men's - Women's)26/-3ReviewNoNoYesDown8501133,388Coreloft80 + 100 g/m²Arato 15All RoundTrim335 g / 11.8 oz72 cm / 28.3 in
Arc'teryx Cerium Hybrid (Women's)44/7NoNoYesDown850441,319Coreloft40 + 100 g/m²Arato 15 + Fortius Air 50All RoundTrim260 g / 9.2 oz70 cm / 27.5 in
Arc'teryx Coelle (Women's)14/-10NoYesNoParkaN/AN/AN/ACoreloft98 g/m²40D 2L Gore-TexAround TownRegular435g / 15.3 oz70 cm / 27.5 in
Arc'teryx Liatris (Women's)5/-15NoNoNoParka850932,788Climashield80 g/m2 + 60 g/m270D 3L Gore-TexAround TownRegular890 g / 1 lb 15.4 oz75 cm / 29.5 in
Arc'teryx Liatris Parka (Women's)2/-17NoNoNoParka8501364,078Climashield80 g/m2 + 60 g/m270D 3L Gore-TexAround TownRegular1.093 kg / 2 lb 6.6 oz109 cm / 43 in
Arc'teryx Nuclei (aka FL) ( Men's - Women's)32/0ReviewNoNoYesSyntheticN/AN/AN/ACoreloft Continuous65 g/m²Arato 10rAll RoundRegular325 g / 11.5 oz75 cm / 29.5 in
Arc'teryx Nuclei SV (Women's)5/-15ReviewNoYesYesSyntheticN/AN/AN/ACoreloft Continuous190 g/m2 + 90 g/m2Arato 15All RoundRegular600 g / 1 lb 5.2 oz81 cm / 31.8 in
Arc'teryx Patera (Women's)21/-6ReviewNoYesNoParka750671,773Coreloft60 + 80 g/m²2L Gore-TexAround TownTrim867 g / 1 lb 14.6 oz99 cm / 39 in
Arc'teryx Patera Long (Women's)0/-18NoYesNoParka7502045,397Coreloft60 + 80 g/m²2L Gore-TexAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 in
Arc'teryx Proton Lightweight (aka FL) (Men's - Women's)48/9ReviewNoNoNoSyntheticN/AN/AN/AOcta Loft94 g/m²Fortius Air 20ClimbingTrim343 g / 12.1 oz75 cm / 29.5 in
Arc'teryx Therme Parka (Men's)5/-15ReviewNoYesNoParka7501203,175Coreloft60 + 80 g/m²P75d PolyesterAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 in
Arc'teryx Therme SV (Men's)-11/-24ReviewNoYesNoParka7502115,582Coreloft60 g/m²2L Gore-TexAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 in
Arc'teryx Thorium ( Men's - Women's)12/-11ReviewNoYesYesDown7501403,704Coreloft80 + 140 g/m²Arato 30All RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 in
Arc'teryx Thorium Parka (Women's)-2/-19ReviewNoYesNoDown7502095,529Coreloft80 + 140 g/m²Arato 20Around TownRegular610 g / 1 lb 5.5 oz115.8 cm / 45.6 in
Arc'teryx Thorium SV (Men's)3/-16NoYesYesDown7501694,471Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumAround TownRegular645 g / 1 lb 6.8 oz73 cm / 28.75 in
Arc'teryx Thorium SV Parka (Men's)0/-18NoYesNoDown7501955,159Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumAround TownRegular685 g / 1 lb 8.2 oz85 cm / 33.5 in
Black Diamond Access Down (Men's - Women's)7/-14NoYesYesDown7001553,827N/AN/A30D ripstop nylonAll RoundRegular442 g / 15.6 oz76 cm / 29.75 in
Feathered Friends Eos(Men's - Women's)8/-13NoNoYesDown9001053,333N/AN/APertex QuantumAll RoundRegular306 g / 10.8 oz?
Feathered Friends Khumbu (Men's)-17/-27NoNoYesDown90037812,000Primaloft Gold200 gPretex Shield XTAll RoundRegular960 g / 2 lb 2 oz?
Mountain Equipment Exo (Men's)-10/-23NoYesYesDown8002657,478N/AN/ANylonAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 in
Mountain Equipment K7 (Men's)-13/-25NoYesYesDown8003008,466N/AN/A30D DriliteAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 in
Mountain Hardwear GW/2 (Men's - Women's)28/-2NoNoYesDown800852,399N/AN/A10D Ripstop NylonAll RoundTrim250 g / 8.8 oz70 cm / 27.5 in
Outdoor Research Sup. Alp. (Men's - Women's)3/-16NoYesNoDown8001825,136N/AN/A30D Pertex Quantum ProAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 in
Patagonia AlpLight (Men's - Women's)36/2NoNoYesDown8001002,822N/AN/A0.8 oz 10D polyesterAll RoundSlim270 g / 9.5 oz74 cm / 29 in
Patagonia AlpLoft (Men's)-10/-23NoYesYesDown8002958,325N/AN/APertex QuantomAll RoundRegular680 g / 1 lb 8 oz81 cm / 31.8 in
Patagonia DAS (Men's - Women's)10/-12ReviewNoYesYesSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProAll RoundRegular555 g / 1 lb 3.6 oz84 cm / 33 in
Patagonia DAS Light(Men's)34/1ReviewNoYesYesSyntheticN/AN/AN/APlumaFill65 g10D Pertex Quantum ProAll RoundRegular320 g / 11.3 oz77 cm / 30.5 in
Patagonia Down Sweater (Men's - Women's)23/-5ReviewNoNoYesDown8001504,233N/AN/A1.4 oz 20x30D polyesterAll RoundRegular428 g / 15.1 oz67 cm / 26.25 in
Patagonia Downdrift (Men's - Women's)18/-8NoNoNoDown6002795,905N/AN/A4.2 oz polyesterAround TownRegular1.014 kg / 2 lb 3.8 oz?
Patagonia Fitz Roy (Men's - Women's)14/-10NoNoYesDown8001283,612N/AN/A20D NylonAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 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
Patagonia Jackson Glacier (Men's - Women's)12/-11ReviewNoYesNoDown7001413,482N/AN/A3.6 oz 50D polyesterAround TownRegular880 g / 1 lb 15 oz79 cm / 31 in
Patagonia Jackson Glacier Parks ( Women's)7/-14NoNoNoParka7002185,383N/AN/A50D PolyesterAround TownRegular1.142 kg / 2 lb 8.3 oz?
Patagonia Micro Puff (Men's - Women's)37/3ReviewNoNoYesSyntheticN/AN/AN/APlumaFill65 gPertex QuantumAll RoundRegular298 g / 10.5 oz75 cm / 29.5 in
Patagonia Nano Air (Men's - Women's)39/4ReviewNoNoYesSyntheticN/AN/AN/AFullRange60 g33D nylon ripstopAll RoundTrim401 g / 14.14 oz?
Patagonia Nano Air Light Hybrid (Men's - Women's)50/10NoNoNoSyntheticN/AN/AN/AFullRange40 g20D nylon ripstopAll RoundTrim335 g / 11.8 oz?
Patagonia Nano Puff (Men's - Women's)41/5ReviewNoNoYesSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco60 g22D PolyesterAll RoundRegular363 g / 12.8 oz71.5 cm / 28 in
Patagonia Silent Down (Men's - Women's)26/-3ReviewNoNoNoDown7001092,691N/AN/A2.2 oz polyesterAround TownRegular585 g / 1 lb 4.7 oz74 cm / 29 in
Patagonia Stormshadow (Men's)0/-18NoNoNoParka7002596,395N/AN/A75D PolyesterAround TownRegular1.182 kg / 2 lb 9.7 oz?
Patagonia Tres 3-in-1Patagonia Tres 3-in-1 (Men's - Women's)8/-13ReviewNoNoNoParka7001182,914N/AN/A5.5 oz polyesterAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 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
Rab Electron Pro (Men's - Women's)5/-15NoYesYesDown8001805,079N/AN/A20D Pertex Quantum ProAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 in
Rab Infinity Alpine (Men's)5/-15NoYesYesDown8001754,938N/AN/A30D & 13D Gore-Tex InfiniumAll RoundRegular551 g / 1 lb 3.4 oz76.5 cm / 30.1 in
Rab Infinity Microlight (Men's - Women's)19/-7NoNoYesDown7001463,605N/AN/A13D Gore-Tex InfiniumAll RoundRegular452 g / 15.9 oz74 cm / 29.1 in
Rab Microlight Alpine (Men's - Women's)7/-14NoNoYesDown7001533,778N/AN/A30D Pertex QuantumAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 in
Rab Neutrino Pro (Men's - Women's)-2/-19NoYesYesDown8002125,982N/AN/A20D Pertex Quantum ProAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 in
Rab Positron Pro (Men's)-13/-25NoYesYesDown8003008,466N/AN/A40D Pertex Quantum ProAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 in
REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10NoNoYesDown8501203,598N/AN/APertex mini ripstop nylonAll RoundRegular340 g / 13.75 oz74 cm / 29.25 in
 

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)ReviewPit venting?Two way zipper?Stuffs into itself?TypeFill Power (in3/oz)Fill Weight (g)Fill Volume (in3)Synthetic FillSynth. Fill WeightFace FabricActivityFitWeightLength (CB)
Arc'teryx Alpha Parka (Men's - Women's)-18/-28ReviewNoYesYesDown8502968,875Coreloft90 g/m²N30r 2L GoreTex InfiniumClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 in
Arc'teryx Alpha Lightweight (Men's - Women's)5/-15NoYesYesDown8501173,508Coreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumClimbingRegular540 g / 1 lb 3 oz79.5 cm / 31.25 in
Arc'teryx Atom (aka 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 Atom Heavyweight (aka 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
Arc'teryx Atom Lightweight (aka SL) (Men's - Women's)52/11ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²20D TyonoAll RoundTrim270 g / 9.5 oz72 cm / 28.3 in
Arc'teryx Beta Down Insulated (Men's)0/-18YesYesNoParka8501263,778Coreloft80 g/m²2L 40D Gore-TexAll RoundRegular760 g / 1 lb 10.8 oz79 cm / 31 in
Arc'teryx Beta Insulated (Men's)21/-6ReviewYes, zipsYesNoParkaN/AN/AN/ACoreloft Continuous80 g/m²2L 40D Gore-TexAll RoundRegular680 g / 1 lb 8 oz78.5 cm / 31 in
Arc'teryx Beta Insulated Coat (Women's)16/-9ReviewNoYesNoParkaN/AN/AN/ACoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexAround TownRegular600 g / 1 lb 5.2 oz86 cm / 34 in
Arc'teryx Cerium (aka LT) (Men's - Women's)26/-3ReviewNoNoYesDown8501133,388Coreloft80 + 100 g/m²Arato 15All RoundTrim335 g / 11.8 oz72 cm / 28.3 in
Arc'teryx Cerium Hybrid (Women's)44/7NoNoYesDown850441,319Coreloft40 + 100 g/m²Arato 15 + Fortius Air 50All RoundTrim260 g / 9.2 oz70 cm / 27.5 in
Arc'teryx Coelle (Women's)14/-10NoYesNoParkaN/AN/AN/ACoreloft98 g/m²40D 2L Gore-TexAround TownRegular435g / 15.3 oz70 cm / 27.5 in
Arc'teryx Liatris (Women's)5/-15NoNoNoParka850932,788Climashield80 g/m2 + 60 g/m270D 3L Gore-TexAround TownRegular890 g / 1 lb 15.4 oz75 cm / 29.5 in
Arc'teryx Liatris Parka (Women's)2/-17NoNoNoParka8501364,078Climashield80 g/m2 + 60 g/m270D 3L Gore-TexAround TownRegular1.093 kg / 2 lb 6.6 oz109 cm / 43 in
Arc'teryx Nuclei (aka FL) ( Men's - Women's)32/0ReviewNoNoYesSyntheticN/AN/AN/ACoreloft Continuous65 g/m²Arato 10rAll RoundRegular325 g / 11.5 oz75 cm / 29.5 in
Arc'teryx Nuclei SV (Women's)5/-15ReviewNoYesYesSyntheticN/AN/AN/ACoreloft Continuous190 g/m2 + 90 g/m2Arato 15All RoundRegular600 g / 1 lb 5.2 oz81 cm / 31.8 in
Arc'teryx Patera (Women's)21/-6ReviewNoYesNoParka750671,773Coreloft60 + 80 g/m²2L Gore-TexAround TownTrim867 g / 1 lb 14.6 oz99 cm / 39 in
Arc'teryx Patera Long (Women's)0/-18NoYesNoParka7502045,397Coreloft60 + 80 g/m²2L Gore-TexAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 in
Arc'teryx Proton Lightweight (aka FL) (Men's - Women's)48/9ReviewNoNoNoSyntheticN/AN/AN/AOcta Loft94 g/m²Fortius Air 20ClimbingTrim343 g / 12.1 oz75 cm / 29.5 in
Arc'teryx Therme Parka (Men's)5/-15ReviewNoYesNoParka7501203,175Coreloft60 + 80 g/m²P75d PolyesterAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 in
Arc'teryx Therme SV (Men's)-11/-24ReviewNoYesNoParka7502115,582Coreloft60 g/m²2L Gore-TexAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 in
Arc'teryx Thorium ( Men's - Women's)12/-11ReviewNoYesYesDown7501403,704Coreloft80 + 140 g/m²Arato 30All RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 in
Arc'teryx Thorium Parka (Women's)-2/-19ReviewNoYesNoDown7502095,529Coreloft80 + 140 g/m²Arato 20Around TownRegular610 g / 1 lb 5.5 oz115.8 cm / 45.6 in
Arc'teryx Thorium SV (Men's)3/-16NoYesYesDown7501694,471Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumAround TownRegular645 g / 1 lb 6.8 oz73 cm / 28.75 in
Arc'teryx Thorium SV Parka (Men's)0/-18NoYesNoDown7501955,159Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumAround TownRegular685 g / 1 lb 8.2 oz85 cm / 33.5 in
Black Diamond Access Down (Men's - Women's)7/-14NoYesYesDown7001553,827N/AN/A30D ripstop nylonAll RoundRegular442 g / 15.6 oz76 cm / 29.75 in
Feathered Friends Eos(Men's - Women's)8/-13NoNoYesDown9001053,333N/AN/APertex QuantumAll RoundRegular306 g / 10.8 oz?
Feathered Friends Khumbu (Men's)-17/-27NoNoYesDown90037812,000Primaloft Gold200 gPretex Shield XTAll RoundRegular960 g / 2 lb 2 oz?
Mountain Equipment Exo (Men's)-10/-23NoYesYesDown8002657,478N/AN/ANylonAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 in
Mountain Equipment K7 (Men's)-13/-25NoYesYesDown8003008,466N/AN/A30D DriliteAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 in
Mountain Hardwear GW/2 (Men's - Women's)28/-2NoNoYesDown800852,399N/AN/A10D Ripstop NylonAll RoundTrim250 g / 8.8 oz70 cm / 27.5 in
Outdoor Research Sup. Alp. (Men's - Women's)3/-16NoYesNoDown8001825,136N/AN/A30D Pertex Quantum ProAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 in
Patagonia AlpLight (Men's - Women's)36/2NoNoYesDown8001002,822N/AN/A0.8 oz 10D polyesterAll RoundSlim270 g / 9.5 oz74 cm / 29 in
Patagonia AlpLoft (Men's)-10/-23NoYesYesDown8002958,325N/AN/APertex QuantomAll RoundRegular680 g / 1 lb 8 oz81 cm / 31.8 in
Patagonia DAS (Men's - Women's)10/-12ReviewNoYesYesSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProAll RoundRegular555 g / 1 lb 3.6 oz84 cm / 33 in
Patagonia DAS Light(Men's)34/1ReviewNoYesYesSyntheticN/AN/AN/APlumaFill65 g10D Pertex Quantum ProAll RoundRegular320 g / 11.3 oz77 cm / 30.5 in
Patagonia Down Sweater (Men's - Women's)23/-5ReviewNoNoYesDown8001504,233N/AN/A1.4 oz 20x30D polyesterAll RoundRegular428 g / 15.1 oz67 cm / 26.25 in
Patagonia Downdrift (Men's - Women's)18/-8NoNoNoDown6002795,905N/AN/A4.2 oz polyesterAround TownRegular1.014 kg / 2 lb 3.8 oz?
Patagonia Fitz Roy (Men's - Women's)14/-10NoNoYesDown8001283,612N/AN/A20D NylonAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 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
Patagonia Jackson Glacier (Men's - Women's)12/-11ReviewNoYesNoDown7001413,482N/AN/A3.6 oz 50D polyesterAround TownRegular880 g / 1 lb 15 oz79 cm / 31 in
Patagonia Jackson Glacier Parks ( Women's)7/-14NoNoNoParka7002185,383N/AN/A50D PolyesterAround TownRegular1.142 kg / 2 lb 8.3 oz?
Patagonia Micro Puff (Men's - Women's)37/3ReviewNoNoYesSyntheticN/AN/AN/APlumaFill65 gPertex QuantumAll RoundRegular298 g / 10.5 oz75 cm / 29.5 in
Patagonia Nano Air (Men's - Women's)39/4ReviewNoNoYesSyntheticN/AN/AN/AFullRange60 g33D nylon ripstopAll RoundTrim401 g / 14.14 oz?
Patagonia Nano Air Light Hybrid (Men's - Women's)50/10NoNoNoSyntheticN/AN/AN/AFullRange40 g20D nylon ripstopAll RoundTrim335 g / 11.8 oz?
Patagonia Nano Puff (Men's - Women's)41/5ReviewNoNoYesSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco60 g22D PolyesterAll RoundRegular363 g / 12.8 oz71.5 cm / 28 in
Patagonia Silent Down (Men's - Women's)26/-3ReviewNoNoNoDown7001092,691N/AN/A2.2 oz polyesterAround TownRegular585 g / 1 lb 4.7 oz74 cm / 29 in
Patagonia Stormshadow (Men's)0/-18NoNoNoParka7002596,395N/AN/A75D PolyesterAround TownRegular1.182 kg / 2 lb 9.7 oz?
Patagonia Tres 3-in-1Patagonia Tres 3-in-1 (Men's - Women's)8/-13ReviewNoNoNoParka7001182,914N/AN/A5.5 oz polyesterAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 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
Rab Electron Pro (Men's - Women's)5/-15NoYesYesDown8001805,079N/AN/A20D Pertex Quantum ProAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 in
Rab Infinity Alpine (Men's)5/-15NoYesYesDown8001754,938N/AN/A30D & 13D Gore-Tex InfiniumAll RoundRegular551 g / 1 lb 3.4 oz76.5 cm / 30.1 in
Rab Infinity Microlight (Men's - Women's)19/-7NoNoYesDown7001463,605N/AN/A13D Gore-Tex InfiniumAll RoundRegular452 g / 15.9 oz74 cm / 29.1 in
Rab Microlight Alpine (Men's - Women's)7/-14NoNoYesDown7001533,778N/AN/A30D Pertex QuantumAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 in
Rab Neutrino Pro (Men's - Women's)-2/-19NoYesYesDown8002125,982N/AN/A20D Pertex Quantum ProAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 in
Rab Positron Pro (Men's)-13/-25NoYesYesDown8003008,466N/AN/A40D Pertex Quantum ProAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 in
REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10NoNoYesDown8501203,598N/AN/APertex mini ripstop nylonAll RoundRegular340 g / 13.75 oz74 cm / 29.25 in
 

Performance data axis of synthetic jackets (this table) and shell jackets (table below) are different. Don't compare them. 

  • Performance ratings of Arc'teryx shells

NameActivityTemp (F/C)BreathabilityWeather Res.DurabilityBottom lineReviewPit zips?Two way zipper?Stuffs into itself?Face FabricFitWeightLength
Alpha (aka AR) (Men's - Women's)ClimbingN/A8/109/108/104/10Go-to climbing harshell. ReviewYesNoNoN40d & N80d Most Rugged 3L Gore-Tex ProRegular430 g / 15.2 oz79.5 cm / 31.25 inNo
Alpha SV (Men's - Women's)ClimbingN/A8/1010/1010/103/10Strongest climbing hardshell. ReviewYesNoNoN100d Most Rugged 3L Gore-Tex ProRegular510 g / 1 lb 2 oz78 cm / 30.75 inNo
Beta (Men's - Women's)All RoundN/A6/107/107/108/10Streamlined all-doer shell.ReviewNoNoNoN30p-X 3L Gore-TexTrim300 g / 10.6 oz76 cm / 30 inNo
Beta AR (Men's - Women's)All RoundN/A8/109/109/104/10Go-to all-round harshell. ReviewYesNoNoN40d & N80d Most Rugged 3L Gore-Tex ProRegular460 g / 1 lb 76 cm / 30 inNo
Beta AR StormHood (Men's - Women's)All RoundN/A8/109/109/104/10ReviewYesNoNoN40d & N80d Most Rugged 3L Gore-Tex ProRegular460 g / 1 lb 76 cm / 30 inNo
Beta Coat (Women's)All RoundN/A6/105/10No data5/10NoYesNo3L Gore-TexRegular320 g / 11.3 oz88 cm / 34.5 inNo
Beta Down Insulated (Men's)All Round0/-189/107/108/10No dataYesYesNo2L 40D Gore-TexRegular760 g / 1 lb 10.8 oz79 cm / 31 inNo
Beta Insulated (Men's - Women's)All Round21/-69/107/108/10No dataGo-to hybrid jacket.ReviewYesYesNoN40d 2L Gore-TexRegular680 g / 1 lb 8 oz78.5 cm / 31 inNo
Beta Insulated Coat (Women's)All Round16/-97/10No dataNo dataNo dataNoYesNoN40d 2L Gore-TexRegular600 g / 1 lb 5.2 oz86 cm / 34 inNo
Beta Lightweight (Men's - Women's)All RoundN/A8/107/107/106/10ReviewYesNoNoN40p 3L Gore-TexFitted380 g / 13.4 oz75 cm / 29.5 inNo
Beta LT (Men's - Women's)All RoundN/A7/107/108/106/10ReviewYesNoNoN40d 3L Gore-TexFitted395 g / 13.9 oz76 cm / 30 inNo
Gamma (aka LT) (Men's - Women's)All RoundN/A7/103/107/103/10Go-to softshell.ReviewNoNoNoWee Burly Double WeaveRegular545 g / 1 lb 3.2 oz76 cm / 30 inNo
Gamma MX (Men's)All RoundN/A6/104/108/103/10Strongest softshell.ReviewNoNoNoFortius 2.0Regular555 g / 1 lb 3.6 oz74 cm / 29.1 inNo
Norvan Shell (Men's)RunningN/ANo dataNo dataNo dataNo dataNoNoNo13D 3L Gore-TexTrim190 g / 6.7 oz73 cm / 28.75 inNo
Rush (Women's)SkiingN/A8/109/109/103/10Go-to ski jacket. ReviewYesNoNoN80p-X & N100p-X 3L Most Rugged Gore-Tex ProRegular590 g / 1 lb 4.8 oz79.5 cm / 31.25 inNo
Rush Insulated (Women's)Skiing16/-93/105/105/109/10ReviewNoNoYesHadron 2L Gore-Tex InfiniumRegular515 g / 1 lb 2.2 oz79 cm / 31 inYes
Sabre (Men's)SkiingN/A8/108/107/102/10ReviewYesNoNoN80p-X 3L Gore-TexRegular705 g / 1 lb 8.9 oz79 cm / 31 inNo
Sentinel (Women's)SkiingN/A8/107/107/102/10Go-to ski jacket. ReviewYesNoNoN70p 3L Gore-TexRegular640 g / 1 lb 6.6 oz73.7 cm / 29 inNo
Sentinel Insulated (Women's)Skiing21/-68/10No dataNo dataNo dataReviewYesNoNoN80p 2L Gore-TexRegular600 g / 1 lb 5.2 oz79.8 cm / 31.5 inNo
Sentinel Relaxed (Women's)SkiingN/ANo dataNo dataNo dataNo dataYesNoNoN80p 3L Gore-TexRegular655 g / 1 lb 7.1 oz?No
Sidewinder (Women's)SkiingN/A8/108/107/102/10YesNoNoN80p 3L Gore-TexRegular570 g / 1 lb 4.1 oz?No
Solano (Men's - Women's)Around TownN/ANo dataNo dataNo dataNo dataReviewNoNoNoGore-Tex InfiniumRelaxed355 g / 12.5 oz72 cm / 28.3 inNo
Squamish (Men's - Women's)RunningN/A5/104/107/109/10Go-to running jacket.ReviewNoNoYes30D TyonoTrim140 g / 4.9 oz77.5 cm / 30.5 inNo
Theriss Down (Women's)SkiingNo data7/106/107/102/10ReviewYesNoNoN80p 2L Gore-TexRegular709 g / 1 lb 9 oz63 cm / 24.8 inNo
Alpha FL (Men's - Women's)ClimbingN/A7/10No dataNo data10/10NoNoYesHadron 3L Gore-TexTrim209 g / 7.4 oz76.5 cm / 30 inYes
Alpha IS (Men's)Climbing23/-57/105/10No data8/10NoYesYesN40p-X 2L Gore-TexRegular610 g / 1 lb 5.5 oz78 cm / 30.75 inYes
Alpha SL (Men's - Women's)ClimbingN/A5/107/10No data9/10NoNoYesN40p 3L Gore-TexTrim326 g / 11.5 oz77.5 cm / 30.5 inYes
Beta SV (Men's - Women's)All RoundN/A8/1010/1010/103/10Strongest all-round harshell. ReviewYesNoNoN80p-X Most Rugged 3L Gore-Tex ProRegular495 g / 1 lb 1.5 oz79 cm / 31 inYes
Gamma SL (aka lightweight) (Men's - Women's)All RoundN/A7/102/106/105/10ReviewNoNoNoFortius 1.0Trim310 g / 10.9 oz74 cm / 29.1 inYes
Incendia (Women's)SkiingN/A8/109/109/103/10ReviewYesNoNoNP100d 3L Gore-TexTrim610 g / 1 lb 5.5 oz79 cm / 31 inYes
Incendo (Men's)RunningN/A7/104/105/1010/10ReviewNoNoYesLuminTrim125 g / 4.4 oz?Yes
Incendo Airshell (Men'sRunningN/ANo dataNo dataNo dataNo dataNoNoYes?Trim105 g / 3.7 oz?Yes
Incendo SL (Men's)RunningN/A7/104/104/1010/10ReviewNoNoYesPermair 20 & CanimTrim80 g / 2.8 oz73 cm / 28.75 inYes
Macai (Men's)Skiing5/-157/107/106/101/10ReviewYesNoNoN40p-X 3L Gore-TexRegular990 g / 2 lb 2.9 oz75 cm / 29.5 inYes
Macai Lightweight (aka LT) (Men's)Skiing8/-137/107/106/102/10ReviewYesNoNoN40p-X 3L Gore-TexRegular855 g / 1 lb 14.2 oz?Yes
Macai Shell (Men's)SkiingN/ANo dataNo dataNo dataNo dataReviewYesNoNoN80p-X 3L Gore-TexRegular775 g / 1 lb 11.3 oz?Yes
Micon (Men's)SkiingN/ANo dataNo dataNo dataNo dataYesNoNoN80p 3L Gore-TexRegular685 g / 1 lb 8.2 oz83 cm / 32.5 inYes
Micon HeatherSkiingN/ANo dataNo dataNo dataNo dataYesNoNoNP100-d 3L Gore-TexRegular685 g / 1 lb 8.2 oz83 cm / 32.5 inYes
Nodin (Men's - Women's)RunningN/A8/105/105/1010/10NoNoYes20D TyonoTrim130 g / 4.6 oz75 cm / 29.5 inYes
Norvan LT (Men's - Women's)RunningN/A5/105/108/106/10NoNoNoN13p 3L Gore-TexTrim190 g / 6.7 oz?Yes
Norvan SL (Men's - Women's)RunningN/A7/106/108/108/10ReviewNoNoYesGore-Tex InfiniumTrim120 g / 4.2 oz77 cm / 30.4 inYes
Norvan SL Ins. (Women's)Running39/4No dataNo dataNo dataNo dataNoNoYesGore-Tex ShakeDryTrim270 g / 9.5 oz71.5 cm / 28.1 inYes
Norvan Windshell (Men'sRunningN/ANo dataNo dataNo dataNo dataNoNoYesPermeair 20Trim90 g / 3.2 oz73 cm / 28.75 inYes
Procline (Men's)SkiingN/ANo dataNo dataNo dataNo dataYesNoNoN70p Gore-Tex InfiniumTrim720 g / 1 lb 9.4 oz76 cm / 30 inYes
Ravenna (Women's)SkiingN/A8/107/108/103/10ReviewYesNoNoN70s-4 3L Gore-TexTrim725 g / 1 lb 9.6 oz69.5 cm / 27.4 inYes
Ravenna LT (Women's)SkiingN/A6/106/106/105/10ReviewYesNoNoN70p 3L Gore-TexTrim540 g / 1 lb 3 oz69 cm / 27.2 inYes
Sabre AR (Men's)SkiingN/A7/108/107/107/10ReviewYesNoNoN70p 3L Gore-TexRegular700 g / 1 lb 8.7 oz79 cm / 31 inYes
Sabre Insulated (See related products)SkiingNo data7/10No data6/10No dataReviewYesNoNoN80p 2L Gore-TexRegular815 g / 1 lb 12.7 oz76 cm / 30 inYes
Sabre LT (Men's)SkiingN/A7/108/107/108/10ReviewYesNoNoN80p 3L Gore-TexRegular660 g / 1 lb 7.3 oz83 cm / 32.5 inYes
Sabre SV (Men's)SkiingN/A10/1010/1010/101/10Strongest ski jacket.ReviewYesYesNoN100d Most Rugged 3L Gore-Tex ProRegular595 g / 1 lb 5 oz85 cm / 33.5 inNo
Sentinel AR (Women's)SkiingN/A7/108/107/107/10ReviewYesNoNoN70p 3L Gore-TexRegular590 g / 1 lb 4.8 oz72.5 cm / 28.5 inYes
Sentinel LT (Women's)SkiingN/A7/108/107/108/10ReviewYesNoNoN80p 3L Gore-TexRegular565 g / 1 lb 3.9 oz73.5 cm / 29 inYes
Shashka Stretch (Women's)SkiingN/ANo dataNo dataNo dataNo dataYesNoNoN70p Gore-Tex InfiniumTrim670 g / 1 lb 7.6 oz71 cm / 28 inYes
Trino SL (Men's)RunningN/A8/105/107/106/10ReviewNoNoNoGore-Tex InfiniumTrim340 g / 12 oz74 cm / 29.1 inYes
Trino SL Anorak (Women's)RunningN/A8/107/108/107/10ReviewNoNoNoGore-Tex InfiniumTrim290 g / 10.2 oz65 cm / 25.5 inYes
Venda Anorak (Women's)Around TownN/ANo dataNo dataNo dataNo dataNoNoNoGore-TexRelaxed255 g / 9 oz75.5 cm / 29.7 inYes
Zeta AR (Men's)HikingN/A7/108/107/104/10YesNoNo3L Gore-TexRegular425 g / 15 oz80 cm / 31.5 inYes
Zeta FL (Men's - Women's)HikingN/A4/106/104/106/10NoNoNoN20r 2L Gore-TexTrim221 g / 7.8 oz76 cm / 30 inYes
Zeta LT (Men's - Women's)HikingN/A5/107/108/105/10NoNoNoN40P-X 3L Gore-TexTrim335 g / 11.8 oz78 cm / 30.75 inYes
Zeta SL (Men's - Women's)HikingN/A3/105/104/105/10ReviewNoNoNo2L Gore-TexTrim310 g / 10.9 oz77.8 cm / 30.6 inYes
 

Performance data axis of synthetic jackets (table above) and shell jackets (this table) are different. Don't compare them. 

Most Arc'teryx jackets are equipped with only one insulation density throughout the jacket. It's the same thickness everywhere. 

This causes some areas to be over insulated and other areas to be under insulated. Both has their own downsides. 

Forget the negative impact that over insulation has on the weight for a second. Because what we're talking about is grams in here. 

The primary negative impact of over insulation can mostly be on hindering mobility and comfort. Because some areas, like underarms, do not need that much of insulation. 

The primary effect of under insulation is warmth (surprising news). Some areas, like the yoke, can require more insulation. Because it prevents the heat from escaping. 

That's why Arc'teryx equips some of their jackets with not one but two different insulation thicknesses. Like the Beta Insulated (Men's - Women's - read my review), Therme (Men's - read my review) and Thorium (Men's - Women's - read my review). 

Atom HW is the only Arc'teryx jacket that is equipped with not one, not two, but three different insulation thickness:

  • 120 g/m2 of Coreloft around the yoke, the top of the sleeve, the sides, and the back.
  • 80 g/m2 of Coreloft in the bottom of the sleeves and in the zip guard. 
  • 60 g/m2 of Coreloft everywhere else (the front). 

This customized insulation distribution makes the Atom Hw more comfortable compared to other jackets with similar warmth.

The Atom is still more comfortable than the Atom Hw, though. Because it's insulated less (60 g/m2 of Coreloft everywhere). 

Source of above information: 

These are pretty much the biggest differences between the two models. Atom HW is significantly warmer and less comfortable compared to the Atom.

If you're truly active inside the Atom HW, you're likely to overheat. Despite the side fleece panels. 

For low output activities; like hiking, mountaineering, or resting between climbing sets; however, Atom Heavyweight would be outstanding, in addition to stationary use (no output). 

Poll results: Best colorways of Atom Series

Upvote your favorites.

Atom LT Hoody Men's

Atom SL Hoody Men's

Atom Hoody Women's

Atom Lightweight Hoody Women's

Atom Jacket Women's

Atom Heavyweight Hoody Women's

Now, although it's quite difficult to pinpoint the warmth differences between these two jackets, let me do my best and at least try to give you an idea: 

  • Warmth

Generally speaking, with only a long sleeved shirt under and without a shell on top, for an average person, during daily use (strolls, power walks, etc) and with enough wind to cause an umbrella to twist in your hand:

...without feeling uncomfortably cold, the lowest temperature to wear an Atom would be 36 deg F (2 deg C), and Atom HW around 18 deg F (-8 deg C).

With at least a moderate quality layering:

...Atom would be at 25 deg F (-4 deg C), and Atom HW at 7 deg F (-14 deg C).

With a good base layer under and a shell jacket on top:

...Atom would be at 10 deg F (-10 deg C), and Atom HW at -4 deg F (-20 deg C).

Links: 

Breathability

Atom Heavyweight Armpits

Atom Hw's small armpit mesh panel. 

Atom is the only line in Arc'teryx's entire insulated jacket line-up that offers mechanical ventilation. 

In other words, side fleece panels. 

However, how these panels are incorporated into these jackets still make them very different than one another. 

Look at the side fleece panels of Atom Hw. They only takes place in the armpit area. 

They're small and doesn't help that much with ventilation.

Now look at Atom's much larger panels. They span all the way from the armpits to the hem. 

Atom side fleece panels

Atom's large side fleece panel. 

They're spectacular in terms of providing breathability. This single thing gave the Atom the fame it has today. 

For reference, Atom SL (soon to be called Atom Lw) has even LARGER panels than the Atom!

It's even more breathable. Check out this Proton vs Atom guide to see its images and read more about it

Panels this large can be a mixed blessing, though. Which brings me to my next point. 

Weather Resistance

Water resistances of these two are top notch. I'm 100% sure they're not going to disappoint. They're coated via DWR, too. 

  • 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 at arcteryx.com 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

 

When it comes to the wind resistance, however, it's another story. As you can guess by now, Atom Hw is off the charts in this regard too. 

But when your arms are up, Atom's side fleece panels invite lots of wind and hence cold in. Even when your arms aren't up, it still does that although not equally as much. 

This is something you should to consider. 

Abrasion Resistance

The numbers you see in face fabrics indicate the density (in other words the thickness) of face fabric. 

So, 30D Tyono face fabric of Atom Hw is stronger than 20D Tyono face fabric of Atom. It better resists against the abrasion when bouldering and backpacking. 

  • Fit

Canberk is 5'11" and 165 pounds, with an athletic build. Size Medium fits him perfectly across almost all brands and product lines. 

  • Arc'teryx's 2024 men's fit revision

Here's what Arc'teryx says about its most recent fit revision

Not all jackets come with the revised fit - only the ones with following statement: 

Durability

You'd expect the same relationship between them in terms of durability, too. But there's a caveat here.

Larger side fleece panels of the Atom help with stretching more. This puts less stress on stitches over time, and hence can increase the life of jacket. 

If you have no plans to use these jackets close to a decade, then you can simply ignore this difference. 

The stretchier nature of Atom also makes it more comfortable and allows more mobility. Although I do appreciate the "too small" armpit panels of Atom Hw, they just offer less mobility. 

If you need more durability, definitely check out Proton (Men's - Women's - read how it compares to the Atom) and Proton Heavyweight (Men's - Women's - read how it compares to the Atom Hw)

Pockets

Number of pockets are the same. 2 hand warmers and 1 internal zippered chest pocket in each. 

Sizes of them are very similar too. 

  • Atom Hw: 
    • Hand warmers: 9.4 in (or 24 cm) x 6.7 in (or 17 cm) 
    • Internal zippered chest pocket: 10.6 in (or 27 cm) x 7.5 in (or 19 cm) 
  • Atom:
    • Hand warmers: 10.6 in (or 27 cm) height x 7.1 in (or 18 cm) width
    • Internal zippered chest pocket: 9.9 in (or 25 cm) height x 7.5 in (or 19 cm) width

Cuffs

Both are pretty elastic. 

Atom Heavyweight vs Atom: Cuffs

Left: Atom Heavyweight. Right: Atom. 

Conclusion 

Atom Heavyweight is a loftier, warmer, more weather resistant and durable version of the Atom. It did not have any alternatives to it for a long time. That's why everyone lost their minds when Arc'teryx shortly "discontinued" it. 

Now we have the Proton Heavyweight (Men's - Women's - read how it compares to the Atom Hw), though. 

The Atom, on the other hand, is best used for high output activities in general. It's light and comfortable. If climbing is what you're going to do, then I'd mostly recommend the Proton (Men's - Women's - read how it compares to the Atom) instead of this one. It's more abrasion resistant. 

Both Atom HW and Atom offer mesh side panels which span all the way from the armpits to the hem. These panels are popular. They make them more breathable than all the other Arc'teryx synthetics. 

Keep in mind that overheating inside the Atom HW is easier because it's very warm. That's why people say it's more breathable than the Atom HW. 

Lastly, both are fantastic jackets that won't disappoint. 

Links: 

Also read: 

Long ago I've had captured this on arcteryx.com. Saved it to my computer. Here's their take on both jackets. 


Check out our other content on jackets:

Guide: Insulated & Shell Jackets

Start here:

Also see:

About the Author Canberk K.


Hey, what's up? Canberk here. Arc'teryx addict, gym rat, and Tame Impala fan.