Arc’teryx Nuclei vs Proton: Temp ratings & more

Last updated: February 25, 2025

04
Days
:
 
05
Hours
:
 
33
Minutes
:
 
2017
Seconds

You missed out!

Y'all know these are just my opinions... right?

As we head into fall/winter 2024, Arc'teryx is only offering women's Nuclei models. You can see all current Nuclei offerings here.

Below is our original look at the Nuclei vs. Proton Arc'teryx jackets.

Nuclei vs Proton: Overview

Arc'teryx Proton vs Nuclei: Nuclei SV

Me in Nuclei SV (Men's - Women's - read my review). 

I have all 5 items: 

  • Nuclei line: Niche products. Very warm at an instant, incredibly wind resistant and comfortable. But also not breathable at all and come with fragile outer fabrics. 
    • Nuclei (aka FL): Lesser warm Nuclei. 
    • Nuclei SV: Warmest Nuclei. 
  • Proton line: Versatile all round items. Very breathable and durable. But not that warm or wind resistant. 
    • Proton Lightweight (aka FL): Least warm Proton. 
    • Proton (aka LT): Mid warm Proton. 
    • Proton Heavyweight: Warmest Proton. 

I love them all. As long as you know what you're getting, none of them will disappoint. 

Find comparisons at arcteryx.com below. 

First thing to note is that Nuclei are more niche products.

They're belay jackets, meaning that they're meant to be put on when you stop moving (whatever high output activity you're performing).

They're meant to get them out of the bag and put them on quick to maintain your core temp. 

That's their main purpose. That's why they come with stuff sacks, offer terrible breathability, come with fragile face fabrics that cannot resist abrasion and are cut looser. 

Nuclei vs Proton

From top to bottom: Proton Lw (aka FL), Proton (aka LT), Proton Hw, Nuclei (aka FL) and Nuclei SV. 

They are however also spectacularly warm, incredibly wind resistant and extremely comfortable with a bunch of pockets. Its outstanding warmth to weight ratio is mind blowing. 

You feel the warmth inside a Nuclei at such an instant that it's insane. Unlike Proton, you don't even need to wait for the warmth to pick up. 

This is why I look at Nuclei as down jackets that can get wet. I use them casually as well, as long as my output is none to low. 

Luckily, the SV (the warmer) does come with a two way zipper. I primarily use this for comfort reasons when sitting down or driving (keeping only the upper half zipped).

Other use of two way zipper is for dumping excessive heat. Although it's not as effective as the Atom's side fleece panels it still helps a lot. 

Proton, on the other hand, are far more versatile. They're perfect for any high output activity, including climbing and heavy backpack use where lots of abrasion is expected.

Their cutting edge face fabrics are much more developed than Nuclei. They're breathable, come with a trimmer cut and shorter hem length. 

They're durable and can better resist against abrasion. You can wear them during high output activities or casually. 

But even the warmest Proton, Proton Hw, isn't nearly as warm as the warmest Nuclei, Nuclei SV. On top of that, you've got to wait for it to heat you. 

Although Proton and Nuclei are both water resistant, when it comes to wind resistance, the Nuclei has the edge by far. 

If you rarely get jackets, you might want to get one of the Protons. If warmth and weather resistance are your only concerns, and you don't care about breathability at all, get a Nuclei. 

If you're looking for maximizing the breathability, then you should stop reading here and visit Arc'teryx Proton vs Atom guide instead. I've got all the most recent Atoms, too (Hw (aka AR), base (aka LT) and SL (soon to be Lw)) and they're the most breathable line. 

Find comparisons at arcteryx.com below. 

Nuclei (aka FL) vs Proton Lw (aka FL) vs Proton (aka LT): 

  • Nuclei SV vs Proton Hw: 
  • 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.

    • Nuclei FL → Nuclei
    • Proton FL → Proton Lightweight (in short, Lw)
    • Proton LT → Proton
    • There's also a new arrival, Proton Heavyweight. 

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

    • 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: 

    Nuclei vs Proton: Warmth

    Check out the table below. 

    You'll see not one but two different insulation thicknesses for Nuclei SV. 

    • Two layers of Coreloft (180 gsm) takes place at the front, back, and upper arms. 
    • Single layer of Coreloft (90 gsm) takes place at underarms, lower arm, sides, and hood.
    • Temperature ratings of Arc'teryx jackets

    NameEst. Temp (F/C)BreathabilityWind Res.Abrasion res.PackabilityBest pick forReviewPit venting?Two way zipper?Stuffs into itself?TypeFill Power (in3/oz)Fill Weight (g)Fill Volume (in3)Synthetic FillSynth. Fill WeightFace FabricActivityFitWeightLength (CB)Internal pocketsExternal pocketssentences
    Arc'teryx Alpha Parka (Men's - Women's)-18/-28No dataNo dataNo dataNo dataWarmest Arc'teryx jacket. ReviewNoYesYesDown8502968,875Coreloft90 g/m²N30r 2L GoreTex InfiniumClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 inNobestdownjacketsFill weight of Arc'teryx Alpha Parka (Men's - Women's) is 296 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 8875 cubic inches of down fill volume. It's also reinforced with 90 g/m² of Coreloft.
    Arc'teryx Alpha Lightweight (Men's - Women's)5/-15No dataNo dataNo dataNo dataNoYesYesDown8501173,508Coreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumClimbingRegular540 g / 1 lb 3 oz79.5 cm / 31.25 inNobestdownjacketsFill weight of Arc'teryx Alpha Lightweight (Men's - Women's) is 117 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 3508 cubic inches of down fill volume. It's also reinforced with 40 g/m² of Coreloft Compact.
    Arc'teryx Atom (aka LT) ( Men's - Women's)43/69/106/107/105/10High output activities. ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Continuous60 g/m²20D TyonoAll RoundTrim375 g / 13.2 oz74 cm / 29.1 inNoatomprotonbestsyntheticjackets1x chest-Arc'teryx Atom (aka LT) ( Men's - Women's) is equipped with 60 g/m² of Coreloft Continuous.
    Arc'teryx Atom Heavyweight (aka AR) (Men's - Women's)18/-84/108/108/103/10ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Continuous120 g/m2 + 80 g/m2 + 60 g/m230D TyonoAll RoundRegular475 g / 1 lb 74 cm / 29.1 inNoatomprotonbestsyntheticjackets1x chest-Arc'teryx Atom Heavyweight (aka AR) (Men's - Women's) is equipped with 120 g/m2 + 80 g/m2 + 60 g/m2 of Coreloft Continuous.
    Arc'teryx Atom Lightweight (aka SL) (Men's - Women's)52/1110/102/107/106/10ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²20D TyonoAll RoundTrim270 g / 9.5 oz72 cm / 28.3 inNoatomprotonbestsyntheticjackets--Arc'teryx Atom Lightweight (aka SL) (Men's - Women's) is equipped with 40 g/m² of Coreloft Compact.
    Arc'teryx Beta Down Insulated (Men's)0/-18No dataNo dataNo dataNo dataYesYesNoParka8501263,778Coreloft80 g/m²2L 40D Gore-TexAll RoundRegular760 g / 1 lb 10.8 oz79 cm / 31 inNobestdownjacketsFill weight of Arc'teryx Beta Down Insulated (Men's) is 126 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 3778 cubic inches of down fill volume. It's also reinforced with 80 g/m² of Coreloft.
    Arc'teryx Beta Insulated (Men's)21/-6No dataNo dataNo dataNo dataReviewYes, zipsYesNoParkaN/AN/AN/ACoreloft Continuous80 g/m²2L 40D Gore-TexAll RoundRegular680 g / 1 lb 8 oz78.5 cm / 31 inNoArc'teryx Beta Insulated (Men's) is equipped with 80 g/m² of Coreloft Continuous.
    Arc'teryx Beta Insulated Coat (Women's)16/-9No dataNo dataNo dataTestingReviewNoYesNoParkaN/AN/AN/ACoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexAround TownRegular600 g / 1 lb 5.2 oz86 cm / 34 inNoArc'teryx Beta Insulated Coat (Women's) is equipped with 80 g/m² + 120 g/m² of Coreloft .
    Arc'teryx Cerium (aka LT) (Men's - Women's)26/-3No dataNo dataNo dataNo dataLight down jacket. ReviewNoNoYesDown8501133,388Coreloft80 + 100 g/m²Arato 15All RoundTrim335 g / 11.8 oz72 cm / 28.3 inNobestdownjacketsFill weight of Arc'teryx Cerium (aka LT) (Men's - Women's) is 113 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 3388 cubic inches of down fill volume. It's also reinforced with 80 + 100 g/m² of Coreloft.
    Arc'teryx Cerium Hybrid (Women's)44/7No dataNo dataNo dataNo dataNoNoYesDown850441,319Coreloft40 + 100 g/m²Arato 15 + Fortius Air 50All RoundTrim260 g / 9.2 oz70 cm / 27.5 inNobestdownjackets#REF!
    Arc'teryx Coelle (Women's)14/-10No dataNo dataNo dataNo dataNoYesNoParkaN/AN/AN/ACoreloft98 g/m²40D 2L Gore-TexAround TownRegular435g / 15.3 oz70 cm / 27.5 inNoArc'teryx Cerium Hybrid (Women's) is equipped with 98 g/m² of Coreloft.
    Arc'teryx Liatris (Women's)5/-15No dataNo dataNo dataNo dataNoNoNoParka850932,788Climashield80 g/m2 + 60 g/m270D 3L Gore-TexAround TownRegular890 g / 1 lb 15.4 oz75 cm / 29.5 inNoFill weight of Arc'teryx Liatris (Women's) is 93 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 2788 cubic inches of down fill volume. It's also reinforced with 80 g/m2 + 60 g/m2 of Climashield.
    Arc'teryx Liatris Parka (Women's)2/-17No dataNo dataNo dataNo dataNoNoNoParka8501364,078Climashield80 g/m2 + 60 g/m270D 3L Gore-TexAround TownRegular1.093 kg / 2 lb 6.6 oz109 cm / 43 inNoFill weight of Arc'teryx Liatris Parka (Women's) is 136 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 4078 cubic inches of down fill volume. It's also reinforced with 80 g/m2 + 60 g/m2 of Climashield.
    Arc'teryx Nuclei (aka FL) ( Men's - Women's)32/02/109/102/1010/10ReviewNoNoYesSyntheticN/AN/AN/ACoreloft Continuous65 g/m²Arato 10rAll RoundRegular325 g / 11.5 oz75 cm / 29.5 inNonucleiprotonbestsyntheticjackets2x dump-Arc'teryx Nuclei (aka FL) ( Men's - Women's) is equipped with 65 g/m² of Coreloft Continuous.
    Arc'teryx Nuclei SV (Women's)5/-151/1010/102/108/10Warmest belay jacket. ReviewNoYesYesSyntheticN/AN/AN/ACoreloft Continuous190 g/m2 + 90 g/m2Arato 15All RoundRegular600 g / 1 lb 5.2 oz81 cm / 31.8 inNonucleiprotonbestsyntheticjackets2x dump1x chestArc'teryx Nuclei SV (Women's) is equipped with 190 g/m2 + 90 g/m2 of Coreloft Continuous.
    Arc'teryx Patera (Women's)21/-6No dataNo dataNo dataNo dataReviewNoYesNoParka750671,773Coreloft60 + 80 g/m²2L Gore-TexAround TownTrim867 g / 1 lb 14.6 oz99 cm / 39 inNoFill weight of Arc'teryx Patera (Women's) is 67 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 1773 cubic inches of down fill volume. It's also reinforced with 60 + 80 g/m² of Coreloft.
    Arc'teryx Patera Long (Women's)0/-18No dataNo dataNo dataNo dataWomen's warmest parka. NoYesNoParka7502045,397Coreloft60 + 80 g/m²2L Gore-TexAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 inNoFill weight of Arc'teryx Patera Long (Women's) is 204 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 5397 cubic inches of down fill volume. It's also reinforced with 60 + 80 g/m² of Coreloft.
    Arc'teryx Proton Lightweight (aka FL) (Men's - Women's)48/98/104/107/106/10Chilly summer mornings.ReviewNoNoNoSyntheticN/AN/AN/AOcta Loft94 g/m²Fortius Air 20ClimbingTrim343 g / 12.1 oz75 cm / 29.5 inNoatomprotonnucleiprotonbestsyntheticjackets-1x chestArc'teryx Proton Lightweight (aka FL) (Men's - Women's) is equipped with 94 g/m² of Octa Loft.
    Arc'teryx Therme Parka (Men's)5/-15No dataNo dataNo dataNo dataReviewNoYesNoParka7501203,175Coreloft60 + 80 g/m²P75d PolyesterAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 inNoFill weight of Arc'teryx Therme Parka (Men's) is 120 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 3175 cubic inches of down fill volume. It's also reinforced with 60 + 80 g/m² of Coreloft.
    Arc'teryx Therme SV (Men's)-11/-24No dataNo dataNo dataNo dataMen's warmest parka. ReviewNoYesNoParka7502115,582Coreloft60 g/m²2L Gore-TexAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 inNoFill weight of Arc'teryx Therme SV (Men's) is 211 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 5582 cubic inches of down fill volume. It's also reinforced with 60 g/m² of Coreloft.
    Arc'teryx Thorium ( Men's - Women's)12/-11No dataNo dataNo dataNo dataWarm down jacket.ReviewNoYesYesDown7501403,704Coreloft80 + 140 g/m²Arato 30All RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 inNobestdownjacketsFill weight of Arc'teryx Thorium ( Men's - Women's) is 140 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 3704 cubic inches of down fill volume. It's also reinforced with 80 + 140 g/m² of Coreloft.
    Arc'teryx Thorium Parka (Women's)-2/-19No dataNo dataNo dataNo dataReviewNoYesNoDown7502095,529Coreloft80 + 140 g/m²Arato 20Around TownRegular610 g / 1 lb 5.5 oz115.8 cm / 45.6 inNoFill weight of Arc'teryx Thorium Parka (Women's) is 209 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 5529 cubic inches of down fill volume. It's also reinforced with 80 + 140 g/m² of Coreloft.
    Arc'teryx Thorium SV (Men's)3/-16No dataNo dataNo dataNo dataGore-Tex down jacket.NoYesYesDown7501694,471Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumAround TownRegular645 g / 1 lb 6.8 oz73 cm / 28.75 inNobestdownjacketsFill weight of Arc'teryx Thorium SV (Men's) is 169 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 4471 cubic inches of down fill volume. It's also reinforced with 80 + 140 g/m² of Coreloft.
    Arc'teryx Thorium SV Parka (Men's)0/-18No dataNo dataNo dataNo dataNoYesNoDown7501955,159Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumAround TownRegular685 g / 1 lb 8.2 oz85 cm / 33.5 inNobestdownjacketsFill weight of Arc'teryx Thorium SV Parka (Men's) is 195 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 5159 cubic inches of down fill volume. It's also reinforced with 80 + 140 g/m² of Coreloft.
    Black Diamond Access Down (Men's - Women's)7/-14No dataNo dataNo dataNo dataNoYesYesDown7001553,827N/AN/A30D ripstop nylonAll RoundRegular442 g / 15.6 oz76 cm / 29.75 inNoFill weight of Black Diamond Access Down (Men's - Women's) is 155 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 3827 cubic inches of down fill volume.
    Feathered Friends Eos(Men's - Women's)8/-13No dataNo dataNo dataNo dataNoNoYesDown9001053,333N/AN/APertex QuantumAll RoundRegular306 g / 10.8 oz?NoFill weight of Feathered Friends Eos(Men's - Women's) is 105 grams. Its fill power is 900 cubic inches per ounce, which equals to a total of 3333 cubic inches of down fill volume.
    Feathered Friends Khumbu (Men's)-17/-27No dataNo dataNo dataNo dataNoNoYesDown90037812,000Primaloft Gold200 gPretex Shield XTAll RoundRegular960 g / 2 lb 2 oz?NoFill weight of Feathered Friends Khumbu (Men's) is 378 grams. Its fill power is 900 cubic inches per ounce, which equals to a total of 12000 cubic inches of down fill volume. It's also reinforced with 200 g of Primaloft Gold.
    Mountain Equipment Exo (Men's)-10/-23No dataNo dataNo dataNo dataNoYesYesDown8002657,478N/AN/ANylonAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 inNoFill weight of Mountain Equipment Exo (Men's) is 265 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 7478 cubic inches of down fill volume.
    Mountain Equipment K7 (Men's)-13/-25No dataNo dataNo dataNo dataNoYesYesDown8003008,466N/AN/A30D DriliteAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 inNoFill weight of Mountain Equipment K7 (Men's) is 300 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 8466 cubic inches of down fill volume.
    Mountain Hardwear GW/2 (Men's - Women's)28/-2No dataNo dataNo dataNo dataNoNoYesDown800852,399N/AN/A10D Ripstop NylonAll RoundTrim250 g / 8.8 oz70 cm / 27.5 inNoFill weight of Mountain Hardwear GW/2 (Men's - Women's) is 85 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 2399 cubic inches of down fill volume.
    Outdoor Research Sup. Alp. (Men's - Women's)3/-16No dataNo dataNo dataNo dataNoYesNoDown8001825,136N/AN/A30D Pertex Quantum ProAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 inNoFill weight of Outdoor Research Sup. Alp. (Men's - Women's) is 182 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 5136 cubic inches of down fill volume.
    Patagonia AlpLight (Men's - Women's)36/2No dataNo dataNo dataNo dataNoNoYesDown8001002,822N/AN/A0.8 oz 10D polyesterAll RoundSlim270 g / 9.5 oz74 cm / 29 inNoFill weight of Patagonia AlpLight (Men's - Women's) is 100 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 2822 cubic inches of down fill volume.
    Patagonia AlpLoft (Men's)-10/-23No dataNo dataNo dataNo dataNoYesYesDown8002958,325N/AN/APertex QuantomAll RoundRegular680 g / 1 lb 8 oz81 cm / 31.8 inNoFill weight of Patagonia AlpLoft (Men's) is 295 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 8325 cubic inches of down fill volume.
    Patagonia DAS (Men's - Women's)10/-121/109/103/106/10ReviewNoYesYesSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProAll RoundRegular555 g / 1 lb 3.6 oz84 cm / 33 inNobestsyntheticjackets2x dump1x chestPatagonia DAS (Men's - Women's) is equipped with 133 + 40 g of PrimaLoft Gold Insulation Eco.
    Patagonia DAS Light(Men's)34/12/108/102/109/10ReviewNoYesYesSyntheticN/AN/AN/APlumaFill65 g10D Pertex Quantum ProAll RoundRegular320 g / 11.3 oz77 cm / 30.5 inNobestsyntheticjackets-1x chestPatagonia DAS Light(Men's) is equipped with 65 g of PlumaFill.
    Patagonia Down Sweater (Men's - Women's)23/-5No data4/106/107/10ReviewNoNoYesDown8001504,233N/AN/A1.4 oz 20x30D polyesterAll RoundRegular428 g / 15.1 oz67 cm / 26.25 inNoFill weight of Patagonia Down Sweater (Men's - Women's) is 150 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 4233 cubic inches of down fill volume.
    Patagonia Downdrift (Men's - Women's)18/-8No dataNo dataNo dataNo dataNoNoNoDown6002795,905N/AN/A4.2 oz polyesterAround TownRegular1.014 kg / 2 lb 3.8 oz?NoFill weight of Patagonia Downdrift (Men's - Women's) is 279 grams. Its fill power is 600 cubic inches per ounce, which equals to a total of 5905 cubic inches of down fill volume.
    Patagonia Fitz Roy (Men's - Women's)14/-10No dataNo dataNo dataNo dataNoNoYesDown8001283,612N/AN/A20D NylonAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 inNoFill weight of Patagonia Fitz Roy (Men's - Women's) is 128 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 3612 cubic inches of down fill volume.
    Patagonia Isthmus (Men's)36/2No dataNo dataNo dataNo dataNoNoNoParkaN/AN/AN/AThermoGreen60 g4.2 oz polyesterAround TownRegular895 g / 1 lb 15.6 oz70 cm / 27.5 inNoPatagonia Isthmus (Men's) is equipped with 60 g of ThermoGreen.
    Patagonia Jackson Glacier (Men's - Women's)12/-11No dataNo dataNo dataNo dataReviewNoYesNoDown7001413,482N/AN/A3.6 oz 50D polyesterAround TownRegular880 g / 1 lb 15 oz79 cm / 31 inNoFill weight of Patagonia Jackson Glacier (Men's - Women's) is 141 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 3482 cubic inches of down fill volume.
    Patagonia Jackson Glacier Parks ( Women's)7/-14No dataNo dataNo dataNo dataNoNoNoParka7002185,383N/AN/A50D PolyesterAround TownRegular1.142 kg / 2 lb 8.3 oz?NoFill weight of Patagonia Jackson Glacier Parks ( Women's) is 218 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 5383 cubic inches of down fill volume.
    Patagonia Micro Puff (Men's - Women's)37/35/106/105/108/10ReviewNoNoYesSyntheticN/AN/AN/APlumaFill65 gPertex QuantumAll RoundRegular298 g / 10.5 oz75 cm / 29.5 inNobestsyntheticjackets2x dump-Patagonia Micro Puff (Men's - Women's) is equipped with 65 g of PlumaFill.
    Patagonia Nano Air (Men's - Women's)39/47/105/105/108/10ReviewNoNoYesSyntheticN/AN/AN/AFullRange60 g33D nylon ripstopAll RoundTrim401 g / 14.14 oz?Nobestsyntheticjackets-2x chestPatagonia Nano Air (Men's - Women's) is equipped with 60 g of FullRange.
    Patagonia Nano Air Light Hybrid (Men's - Women's)50/10No dataNo dataNo dataNo dataNoNoNoSyntheticN/AN/AN/AFullRange40 g20D nylon ripstopAll RoundTrim335 g / 11.8 oz?NoPatagonia Nano Air Light Hybrid (Men's - Women's) is equipped with 40 g of FullRange.
    Patagonia Nano Puff (Men's - Women's)41/54/106/106/108/10ReviewNoNoYesSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco60 g22D PolyesterAll RoundRegular363 g / 12.8 oz71.5 cm / 28 inNobestsyntheticjackets1x chest-Patagonia Nano Puff (Men's - Women's) is equipped with 60 g of PrimaLoft Gold Insulation Eco.
    Patagonia Silent Down (Men's - Women's)26/-3No dataNo dataNo dataNo dataReviewNoNoNoDown7001092,691N/AN/A2.2 oz polyesterAround TownRegular585 g / 1 lb 4.7 oz74 cm / 29 inNoFill weight of Patagonia Silent Down (Men's - Women's) is 109 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 2691 cubic inches of down fill volume.
    Patagonia Stormshadow (Men's)0/-18No dataNo dataNo dataNo dataNoNoNoParka7002596,395N/AN/A75D PolyesterAround TownRegular1.182 kg / 2 lb 9.7 oz?NoFill weight of Patagonia Stormshadow (Men's) is 259 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 6395 cubic inches of down fill volume.
    Patagonia Tres 3-in-1Patagonia Tres 3-in-1 (Men's - Women's)8/-13No dataNo dataNo dataNo dataReviewNoNoNoParka7001182,914N/AN/A5.5 oz polyesterAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 inNoFill weight of Patagonia Tres 3-in-1Patagonia Tres 3-in-1 (Men's - Women's) is 118 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 2914 cubic inches of down fill volume.
    Patagonia Vosque 3-in-1 (Women's)10/-12No dataNo dataNo dataNo dataReviewNoNoNoParkaN/AN/AN/AThermoLite100 g65% nylon, 35% polyesterAround TownRegular1.360 kg / 3 lb90 cm / 35.5 inNoPatagonia Vosque 3-in-1 (Women's) is equipped with 100 g of ThermoLite.
    Rab Electron Pro (Men's - Women's)5/-15No dataNo dataNo dataNo dataNoYesYesDown8001805,079N/AN/A20D Pertex Quantum ProAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 inNoFill weight of Rab Electron Pro (Men's - Women's) is 180 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 5079 cubic inches of down fill volume.
    Rab Infinity Alpine (Men's)5/-15No dataNo dataNo dataNo dataNoYesYesDown8001754,938N/AN/A30D & 13D Gore-Tex InfiniumAll RoundRegular551 g / 1 lb 3.4 oz76.5 cm / 30.1 inNoFill weight of Rab Infinity Alpine (Men's) is 175 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 4938 cubic inches of down fill volume.
    Rab Infinity Microlight (Men's - Women's)19/-7No dataNo dataNo dataNo dataNoNoYesDown7001463,605N/AN/A13D Gore-Tex InfiniumAll RoundRegular452 g / 15.9 oz74 cm / 29.1 inNoFill weight of Rab Infinity Microlight (Men's - Women's) is 146 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 3605 cubic inches of down fill volume.
    Rab Microlight Alpine (Men's - Women's)7/-14No dataNo dataNo dataNo dataNoNoYesDown7001533,778N/AN/A30D Pertex QuantumAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 inNoFill weight of Rab Microlight Alpine (Men's - Women's) is 153 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 3778 cubic inches of down fill volume.
    Rab Neutrino Pro (Men's - Women's)-2/-19No dataNo dataNo dataNo dataNoYesYesDown8002125,982N/AN/A20D Pertex Quantum ProAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 inNoFill weight of Rab Neutrino Pro (Men's - Women's) is 212 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 5982 cubic inches of down fill volume.
    Rab Positron Pro (Men's)-13/-25No dataNo dataNo dataNo dataNoYesYesDown8003008,466N/AN/A40D Pertex Quantum ProAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 inNoFill weight of Rab Positron Pro (Men's) is 300 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 8466 cubic inches of down fill volume.
    REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10No dataNo dataNo dataNo dataNoNoYesDown8501203,598N/AN/APertex mini ripstop nylonAll RoundRegular340 g / 13.75 oz74 cm / 29.25 inNoFill weight of REI Magma 850 Hoodie 2.0 (Men's - Women's) is 120 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 3598 cubic inches of down fill volume.
     

    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.PackabilityBest pick forReviewPit venting?Two way zipper?Stuffs into itself?TypeFill Power (in3/oz)Fill Weight (g)Fill Volume (in3)Synthetic FillSynth. Fill WeightFace FabricActivityFitWeightLength (CB)Internal pocketsExternal pocketssentences
    Arc'teryx Alpha Parka (Men's - Women's)-18/-28No dataNo dataNo dataNo dataWarmest Arc'teryx jacket. ReviewNoYesYesDown8502968,875Coreloft90 g/m²N30r 2L GoreTex InfiniumClimbingRegular805 g / 1 lb 12.4 oz86 cm / 34 inNobestdownjacketsFill weight of Arc'teryx Alpha Parka (Men's - Women's) is 296 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 8875 cubic inches of down fill volume. It's also reinforced with 90 g/m² of Coreloft.
    Arc'teryx Alpha Lightweight (Men's - Women's)5/-15No dataNo dataNo dataNo dataNoYesYesDown8501173,508Coreloft Compact40 g/m²Hadron 2L Gore-Tex InfiniumClimbingRegular540 g / 1 lb 3 oz79.5 cm / 31.25 inNobestdownjacketsFill weight of Arc'teryx Alpha Lightweight (Men's - Women's) is 117 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 3508 cubic inches of down fill volume. It's also reinforced with 40 g/m² of Coreloft Compact.
    Arc'teryx Atom (aka LT) ( Men's - Women's)43/69/106/107/105/10High output activities. ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Continuous60 g/m²20D TyonoAll RoundTrim375 g / 13.2 oz74 cm / 29.1 inNoatomprotonbestsyntheticjackets1x chest-Arc'teryx Atom (aka LT) ( Men's - Women's) is equipped with 60 g/m² of Coreloft Continuous.
    Arc'teryx Atom Heavyweight (aka AR) (Men's - Women's)18/-84/108/108/103/10ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Continuous120 g/m2 + 80 g/m2 + 60 g/m230D TyonoAll RoundRegular475 g / 1 lb 74 cm / 29.1 inNoatomprotonbestsyntheticjackets1x chest-Arc'teryx Atom Heavyweight (aka AR) (Men's - Women's) is equipped with 120 g/m2 + 80 g/m2 + 60 g/m2 of Coreloft Continuous.
    Arc'teryx Atom Lightweight (aka SL) (Men's - Women's)52/1110/102/107/106/10ReviewYes, meshNoNoSyntheticN/AN/AN/ACoreloft Compact40 g/m²20D TyonoAll RoundTrim270 g / 9.5 oz72 cm / 28.3 inNoatomprotonbestsyntheticjackets--Arc'teryx Atom Lightweight (aka SL) (Men's - Women's) is equipped with 40 g/m² of Coreloft Compact.
    Arc'teryx Beta Down Insulated (Men's)0/-18No dataNo dataNo dataNo dataYesYesNoParka8501263,778Coreloft80 g/m²2L 40D Gore-TexAll RoundRegular760 g / 1 lb 10.8 oz79 cm / 31 inNobestdownjacketsFill weight of Arc'teryx Beta Down Insulated (Men's) is 126 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 3778 cubic inches of down fill volume. It's also reinforced with 80 g/m² of Coreloft.
    Arc'teryx Beta Insulated (Men's)21/-6No dataNo dataNo dataNo dataReviewYes, zipsYesNoParkaN/AN/AN/ACoreloft Continuous80 g/m²2L 40D Gore-TexAll RoundRegular680 g / 1 lb 8 oz78.5 cm / 31 inNoArc'teryx Beta Insulated (Men's) is equipped with 80 g/m² of Coreloft Continuous.
    Arc'teryx Beta Insulated Coat (Women's)16/-9No dataNo dataNo dataTestingReviewNoYesNoParkaN/AN/AN/ACoreloft 80 g/m² + 120 g/m²2L 40D Gore-TexAround TownRegular600 g / 1 lb 5.2 oz86 cm / 34 inNoArc'teryx Beta Insulated Coat (Women's) is equipped with 80 g/m² + 120 g/m² of Coreloft .
    Arc'teryx Cerium (aka LT) (Men's - Women's)26/-3No dataNo dataNo dataNo dataLight down jacket. ReviewNoNoYesDown8501133,388Coreloft80 + 100 g/m²Arato 15All RoundTrim335 g / 11.8 oz72 cm / 28.3 inNobestdownjacketsFill weight of Arc'teryx Cerium (aka LT) (Men's - Women's) is 113 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 3388 cubic inches of down fill volume. It's also reinforced with 80 + 100 g/m² of Coreloft.
    Arc'teryx Cerium Hybrid (Women's)44/7No dataNo dataNo dataNo dataNoNoYesDown850441,319Coreloft40 + 100 g/m²Arato 15 + Fortius Air 50All RoundTrim260 g / 9.2 oz70 cm / 27.5 inNobestdownjackets#REF!
    Arc'teryx Coelle (Women's)14/-10No dataNo dataNo dataNo dataNoYesNoParkaN/AN/AN/ACoreloft98 g/m²40D 2L Gore-TexAround TownRegular435g / 15.3 oz70 cm / 27.5 inNoArc'teryx Cerium Hybrid (Women's) is equipped with 98 g/m² of Coreloft.
    Arc'teryx Liatris (Women's)5/-15No dataNo dataNo dataNo dataNoNoNoParka850932,788Climashield80 g/m2 + 60 g/m270D 3L Gore-TexAround TownRegular890 g / 1 lb 15.4 oz75 cm / 29.5 inNoFill weight of Arc'teryx Liatris (Women's) is 93 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 2788 cubic inches of down fill volume. It's also reinforced with 80 g/m2 + 60 g/m2 of Climashield.
    Arc'teryx Liatris Parka (Women's)2/-17No dataNo dataNo dataNo dataNoNoNoParka8501364,078Climashield80 g/m2 + 60 g/m270D 3L Gore-TexAround TownRegular1.093 kg / 2 lb 6.6 oz109 cm / 43 inNoFill weight of Arc'teryx Liatris Parka (Women's) is 136 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 4078 cubic inches of down fill volume. It's also reinforced with 80 g/m2 + 60 g/m2 of Climashield.
    Arc'teryx Nuclei (aka FL) ( Men's - Women's)32/02/109/102/1010/10ReviewNoNoYesSyntheticN/AN/AN/ACoreloft Continuous65 g/m²Arato 10rAll RoundRegular325 g / 11.5 oz75 cm / 29.5 inNonucleiprotonbestsyntheticjackets2x dump-Arc'teryx Nuclei (aka FL) ( Men's - Women's) is equipped with 65 g/m² of Coreloft Continuous.
    Arc'teryx Nuclei SV (Women's)5/-151/1010/102/108/10Warmest belay jacket. ReviewNoYesYesSyntheticN/AN/AN/ACoreloft Continuous190 g/m2 + 90 g/m2Arato 15All RoundRegular600 g / 1 lb 5.2 oz81 cm / 31.8 inNonucleiprotonbestsyntheticjackets2x dump1x chestArc'teryx Nuclei SV (Women's) is equipped with 190 g/m2 + 90 g/m2 of Coreloft Continuous.
    Arc'teryx Patera (Women's)21/-6No dataNo dataNo dataNo dataReviewNoYesNoParka750671,773Coreloft60 + 80 g/m²2L Gore-TexAround TownTrim867 g / 1 lb 14.6 oz99 cm / 39 inNoFill weight of Arc'teryx Patera (Women's) is 67 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 1773 cubic inches of down fill volume. It's also reinforced with 60 + 80 g/m² of Coreloft.
    Arc'teryx Patera Long (Women's)0/-18No dataNo dataNo dataNo dataWomen's warmest parka. NoYesNoParka7502045,397Coreloft60 + 80 g/m²2L Gore-TexAround TownRegular1.1 kg / 2 lb 6.8 oz117.5 cm / 46.25 inNoFill weight of Arc'teryx Patera Long (Women's) is 204 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 5397 cubic inches of down fill volume. It's also reinforced with 60 + 80 g/m² of Coreloft.
    Arc'teryx Proton Lightweight (aka FL) (Men's - Women's)48/98/104/107/106/10Chilly summer mornings.ReviewNoNoNoSyntheticN/AN/AN/AOcta Loft94 g/m²Fortius Air 20ClimbingTrim343 g / 12.1 oz75 cm / 29.5 inNoatomprotonnucleiprotonbestsyntheticjackets-1x chestArc'teryx Proton Lightweight (aka FL) (Men's - Women's) is equipped with 94 g/m² of Octa Loft.
    Arc'teryx Therme Parka (Men's)5/-15No dataNo dataNo dataNo dataReviewNoYesNoParka7501203,175Coreloft60 + 80 g/m²P75d PolyesterAround TownRegular991 g / 2 lb 3 oz85 cm / 33.5 inNoFill weight of Arc'teryx Therme Parka (Men's) is 120 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 3175 cubic inches of down fill volume. It's also reinforced with 60 + 80 g/m² of Coreloft.
    Arc'teryx Therme SV (Men's)-11/-24No dataNo dataNo dataNo dataMen's warmest parka. ReviewNoYesNoParka7502115,582Coreloft60 g/m²2L Gore-TexAround TownRegular1.072 kg / 2 lb 5.8 oz96 cm / 37.75 inNoFill weight of Arc'teryx Therme SV (Men's) is 211 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 5582 cubic inches of down fill volume. It's also reinforced with 60 g/m² of Coreloft.
    Arc'teryx Thorium ( Men's - Women's)12/-11No dataNo dataNo dataNo dataWarm down jacket.ReviewNoYesYesDown7501403,704Coreloft80 + 140 g/m²Arato 30All RoundRegular517 g / 1 lb 2.2 oz71.5 cm / 28.1 inNobestdownjacketsFill weight of Arc'teryx Thorium ( Men's - Women's) is 140 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 3704 cubic inches of down fill volume. It's also reinforced with 80 + 140 g/m² of Coreloft.
    Arc'teryx Thorium Parka (Women's)-2/-19No dataNo dataNo dataNo dataReviewNoYesNoDown7502095,529Coreloft80 + 140 g/m²Arato 20Around TownRegular610 g / 1 lb 5.5 oz115.8 cm / 45.6 inNoFill weight of Arc'teryx Thorium Parka (Women's) is 209 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 5529 cubic inches of down fill volume. It's also reinforced with 80 + 140 g/m² of Coreloft.
    Arc'teryx Thorium SV (Men's)3/-16No dataNo dataNo dataNo dataGore-Tex down jacket.NoYesYesDown7501694,471Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumAround TownRegular645 g / 1 lb 6.8 oz73 cm / 28.75 inNobestdownjacketsFill weight of Arc'teryx Thorium SV (Men's) is 169 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 4471 cubic inches of down fill volume. It's also reinforced with 80 + 140 g/m² of Coreloft.
    Arc'teryx Thorium SV Parka (Men's)0/-18No dataNo dataNo dataNo dataNoYesNoDown7501955,159Coreloft80 + 140 g/m²Arato 30 & 2L Gore-Tex InfiniumAround TownRegular685 g / 1 lb 8.2 oz85 cm / 33.5 inNobestdownjacketsFill weight of Arc'teryx Thorium SV Parka (Men's) is 195 grams. Its fill power is 750 cubic inches per ounce, which equals to a total of 5159 cubic inches of down fill volume. It's also reinforced with 80 + 140 g/m² of Coreloft.
    Black Diamond Access Down (Men's - Women's)7/-14No dataNo dataNo dataNo dataNoYesYesDown7001553,827N/AN/A30D ripstop nylonAll RoundRegular442 g / 15.6 oz76 cm / 29.75 inNoFill weight of Black Diamond Access Down (Men's - Women's) is 155 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 3827 cubic inches of down fill volume.
    Feathered Friends Eos(Men's - Women's)8/-13No dataNo dataNo dataNo dataNoNoYesDown9001053,333N/AN/APertex QuantumAll RoundRegular306 g / 10.8 oz?NoFill weight of Feathered Friends Eos(Men's - Women's) is 105 grams. Its fill power is 900 cubic inches per ounce, which equals to a total of 3333 cubic inches of down fill volume.
    Feathered Friends Khumbu (Men's)-17/-27No dataNo dataNo dataNo dataNoNoYesDown90037812,000Primaloft Gold200 gPretex Shield XTAll RoundRegular960 g / 2 lb 2 oz?NoFill weight of Feathered Friends Khumbu (Men's) is 378 grams. Its fill power is 900 cubic inches per ounce, which equals to a total of 12000 cubic inches of down fill volume. It's also reinforced with 200 g of Primaloft Gold.
    Mountain Equipment Exo (Men's)-10/-23No dataNo dataNo dataNo dataNoYesYesDown8002657,478N/AN/ANylonAll RoundRegular770 g / 1 lb 11.2 oz79 cm / 31 inNoFill weight of Mountain Equipment Exo (Men's) is 265 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 7478 cubic inches of down fill volume.
    Mountain Equipment K7 (Men's)-13/-25No dataNo dataNo dataNo dataNoYesYesDown8003008,466N/AN/A30D DriliteAll RoundRegular820 g / 1 lb 13 oz76 cm / 30 inNoFill weight of Mountain Equipment K7 (Men's) is 300 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 8466 cubic inches of down fill volume.
    Mountain Hardwear GW/2 (Men's - Women's)28/-2No dataNo dataNo dataNo dataNoNoYesDown800852,399N/AN/A10D Ripstop NylonAll RoundTrim250 g / 8.8 oz70 cm / 27.5 inNoFill weight of Mountain Hardwear GW/2 (Men's - Women's) is 85 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 2399 cubic inches of down fill volume.
    Outdoor Research Sup. Alp. (Men's - Women's)3/-16No dataNo dataNo dataNo dataNoYesNoDown8001825,136N/AN/A30D Pertex Quantum ProAll RoundRegular825 g / 1 lb 13.1 oz85 cm / 33.5 inNoFill weight of Outdoor Research Sup. Alp. (Men's - Women's) is 182 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 5136 cubic inches of down fill volume.
    Patagonia AlpLight (Men's - Women's)36/2No dataNo dataNo dataNo dataNoNoYesDown8001002,822N/AN/A0.8 oz 10D polyesterAll RoundSlim270 g / 9.5 oz74 cm / 29 inNoFill weight of Patagonia AlpLight (Men's - Women's) is 100 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 2822 cubic inches of down fill volume.
    Patagonia AlpLoft (Men's)-10/-23No dataNo dataNo dataNo dataNoYesYesDown8002958,325N/AN/APertex QuantomAll RoundRegular680 g / 1 lb 8 oz81 cm / 31.8 inNoFill weight of Patagonia AlpLoft (Men's) is 295 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 8325 cubic inches of down fill volume.
    Patagonia DAS (Men's - Women's)10/-121/109/103/106/10ReviewNoYesYesSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco133 + 40 gPertex Quantum ProAll RoundRegular555 g / 1 lb 3.6 oz84 cm / 33 inNobestsyntheticjackets2x dump1x chestPatagonia DAS (Men's - Women's) is equipped with 133 + 40 g of PrimaLoft Gold Insulation Eco.
    Patagonia DAS Light(Men's)34/12/108/102/109/10ReviewNoYesYesSyntheticN/AN/AN/APlumaFill65 g10D Pertex Quantum ProAll RoundRegular320 g / 11.3 oz77 cm / 30.5 inNobestsyntheticjackets-1x chestPatagonia DAS Light(Men's) is equipped with 65 g of PlumaFill.
    Patagonia Down Sweater (Men's - Women's)23/-5No data4/106/107/10ReviewNoNoYesDown8001504,233N/AN/A1.4 oz 20x30D polyesterAll RoundRegular428 g / 15.1 oz67 cm / 26.25 inNoFill weight of Patagonia Down Sweater (Men's - Women's) is 150 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 4233 cubic inches of down fill volume.
    Patagonia Downdrift (Men's - Women's)18/-8No dataNo dataNo dataNo dataNoNoNoDown6002795,905N/AN/A4.2 oz polyesterAround TownRegular1.014 kg / 2 lb 3.8 oz?NoFill weight of Patagonia Downdrift (Men's - Women's) is 279 grams. Its fill power is 600 cubic inches per ounce, which equals to a total of 5905 cubic inches of down fill volume.
    Patagonia Fitz Roy (Men's - Women's)14/-10No dataNo dataNo dataNo dataNoNoYesDown8001283,612N/AN/A20D NylonAll RoundRegular632 g / 1lb 6.3 oz74 cm / 29 inNoFill weight of Patagonia Fitz Roy (Men's - Women's) is 128 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 3612 cubic inches of down fill volume.
    Patagonia Isthmus (Men's)36/2No dataNo dataNo dataNo dataNoNoNoParkaN/AN/AN/AThermoGreen60 g4.2 oz polyesterAround TownRegular895 g / 1 lb 15.6 oz70 cm / 27.5 inNoPatagonia Isthmus (Men's) is equipped with 60 g of ThermoGreen.
    Patagonia Jackson Glacier (Men's - Women's)12/-11No dataNo dataNo dataNo dataReviewNoYesNoDown7001413,482N/AN/A3.6 oz 50D polyesterAround TownRegular880 g / 1 lb 15 oz79 cm / 31 inNoFill weight of Patagonia Jackson Glacier (Men's - Women's) is 141 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 3482 cubic inches of down fill volume.
    Patagonia Jackson Glacier Parks ( Women's)7/-14No dataNo dataNo dataNo dataNoNoNoParka7002185,383N/AN/A50D PolyesterAround TownRegular1.142 kg / 2 lb 8.3 oz?NoFill weight of Patagonia Jackson Glacier Parks ( Women's) is 218 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 5383 cubic inches of down fill volume.
    Patagonia Micro Puff (Men's - Women's)37/35/106/105/108/10ReviewNoNoYesSyntheticN/AN/AN/APlumaFill65 gPertex QuantumAll RoundRegular298 g / 10.5 oz75 cm / 29.5 inNobestsyntheticjackets2x dump-Patagonia Micro Puff (Men's - Women's) is equipped with 65 g of PlumaFill.
    Patagonia Nano Air (Men's - Women's)39/47/105/105/108/10ReviewNoNoYesSyntheticN/AN/AN/AFullRange60 g33D nylon ripstopAll RoundTrim401 g / 14.14 oz?Nobestsyntheticjackets-2x chestPatagonia Nano Air (Men's - Women's) is equipped with 60 g of FullRange.
    Patagonia Nano Air Light Hybrid (Men's - Women's)50/10No dataNo dataNo dataNo dataNoNoNoSyntheticN/AN/AN/AFullRange40 g20D nylon ripstopAll RoundTrim335 g / 11.8 oz?NoPatagonia Nano Air Light Hybrid (Men's - Women's) is equipped with 40 g of FullRange.
    Patagonia Nano Puff (Men's - Women's)41/54/106/106/108/10ReviewNoNoYesSyntheticN/AN/AN/APrimaLoft Gold Insulation Eco60 g22D PolyesterAll RoundRegular363 g / 12.8 oz71.5 cm / 28 inNobestsyntheticjackets1x chest-Patagonia Nano Puff (Men's - Women's) is equipped with 60 g of PrimaLoft Gold Insulation Eco.
    Patagonia Silent Down (Men's - Women's)26/-3No dataNo dataNo dataNo dataReviewNoNoNoDown7001092,691N/AN/A2.2 oz polyesterAround TownRegular585 g / 1 lb 4.7 oz74 cm / 29 inNoFill weight of Patagonia Silent Down (Men's - Women's) is 109 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 2691 cubic inches of down fill volume.
    Patagonia Stormshadow (Men's)0/-18No dataNo dataNo dataNo dataNoNoNoParka7002596,395N/AN/A75D PolyesterAround TownRegular1.182 kg / 2 lb 9.7 oz?NoFill weight of Patagonia Stormshadow (Men's) is 259 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 6395 cubic inches of down fill volume.
    Patagonia Tres 3-in-1Patagonia Tres 3-in-1 (Men's - Women's)8/-13No dataNo dataNo dataNo dataReviewNoNoNoParka7001182,914N/AN/A5.5 oz polyesterAround TownRegular1.307 kg / 2 lb 14.1 oz85 cm / 33.5 inNoFill weight of Patagonia Tres 3-in-1Patagonia Tres 3-in-1 (Men's - Women's) is 118 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 2914 cubic inches of down fill volume.
    Patagonia Vosque 3-in-1 (Women's)10/-12No dataNo dataNo dataNo dataReviewNoNoNoParkaN/AN/AN/AThermoLite100 g65% nylon, 35% polyesterAround TownRegular1.360 kg / 3 lb90 cm / 35.5 inNoPatagonia Vosque 3-in-1 (Women's) is equipped with 100 g of ThermoLite.
    Rab Electron Pro (Men's - Women's)5/-15No dataNo dataNo dataNo dataNoYesYesDown8001805,079N/AN/A20D Pertex Quantum ProAll RoundRegular525 g / 1 lb 2.5 oz74 cm / 29 inNoFill weight of Rab Electron Pro (Men's - Women's) is 180 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 5079 cubic inches of down fill volume.
    Rab Infinity Alpine (Men's)5/-15No dataNo dataNo dataNo dataNoYesYesDown8001754,938N/AN/A30D & 13D Gore-Tex InfiniumAll RoundRegular551 g / 1 lb 3.4 oz76.5 cm / 30.1 inNoFill weight of Rab Infinity Alpine (Men's) is 175 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 4938 cubic inches of down fill volume.
    Rab Infinity Microlight (Men's - Women's)19/-7No dataNo dataNo dataNo dataNoNoYesDown7001463,605N/AN/A13D Gore-Tex InfiniumAll RoundRegular452 g / 15.9 oz74 cm / 29.1 inNoFill weight of Rab Infinity Microlight (Men's - Women's) is 146 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 3605 cubic inches of down fill volume.
    Rab Microlight Alpine (Men's - Women's)7/-14No dataNo dataNo dataNo dataNoNoYesDown7001533,778N/AN/A30D Pertex QuantumAll RoundRegular466 g / 1 lb 0.5 oz72 cm / 28.5 inNoFill weight of Rab Microlight Alpine (Men's - Women's) is 153 grams. Its fill power is 700 cubic inches per ounce, which equals to a total of 3778 cubic inches of down fill volume.
    Rab Neutrino Pro (Men's - Women's)-2/-19No dataNo dataNo dataNo dataNoYesYesDown8002125,982N/AN/A20D Pertex Quantum ProAll RoundRegular585 g / 1 lb 8.6 oz77 cm / 30.3 inNoFill weight of Rab Neutrino Pro (Men's - Women's) is 212 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 5982 cubic inches of down fill volume.
    Rab Positron Pro (Men's)-13/-25No dataNo dataNo dataNo dataNoYesYesDown8003008,466N/AN/A40D Pertex Quantum ProAll RoundRegular740 g / 1 lb 10 oz85 cm / 33.5 inNoFill weight of Rab Positron Pro (Men's) is 300 grams. Its fill power is 800 cubic inches per ounce, which equals to a total of 8466 cubic inches of down fill volume.
    REI Magma 850 Hoodie 2.0 (Men's - Women's)14/-10No dataNo dataNo dataNo dataNoNoYesDown8501203,598N/AN/APertex mini ripstop nylonAll RoundRegular340 g / 13.75 oz74 cm / 29.25 inNoFill weight of REI Magma 850 Hoodie 2.0 (Men's - Women's) is 120 grams. Its fill power is 850 cubic inches per ounce, which equals to a total of 3598 cubic inches of down fill volume.
     

    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 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
    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
    Andessa (Women's)Skiing8/-1310/10No dataNo data1/10YesNoNoN40d 3L Gore-TexTrim869 g / 1 lb 14.7 oz67 cm / 26.4 inYes
    Andessa Shell (Women's)SkiingN/A5/10No dataNo data3/10NoNoNoN70p 3L Gore-TexTrim560 g / 1 lb 3.8 oz?Yes
    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 LongAll RoundN/A4/109/10No data3/10ReviewNoNoNoN80p 3L Gore-TexRegular441 g / 15.6 oz85 cm / 33.5 inYes
    Beta LT (Men's - Women's)All RoundN/A7/107/108/106/10ReviewYesNoNoN40d 3L Gore-TexFitted395 g / 13.9 oz76 cm / 30 inNo
    Beta LT HadronAll RoundN/A7/106/104/105/10NoNoNoHadron 3L Gore-TexFitted255 g / 9 oz76 cm / 30 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
    Cassiar (Men's)SkiingN/A8/107/108/103/10ReviewYesNoNoN70p 3L Gore-TexTrim820 g / 1 lb 12.9 oz74.5 cm / 29.3 inYes
    Cassiar LT (Men's)SkiingN/A6/106/106/105/10ReviewYesNoNoN70p 3L Gore-TexTrim605 g / 1 lb 5.3 oz75 cm / 29.5 inYes
    Cita (Women's)RunningN/A7/104/105/1010/10ReviewNoNoYesLuminTrim120 g / 4.2 oz67.5 cm / 26.5 inYes
    Cita SL (Women's)RunningN/A7/104/104/1010/10ReviewYesNoYesPermeair 20Trim65 g / 2.3 oz61.5 cm / 24.2 inYes
    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 SL (aka lightweight) (Men's - Women's)All RoundN/A7/102/106/105/10ReviewNoNoNoFortius 1.0Trim310 g / 10.9 oz74 cm / 29.1 inYes
    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
    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
    Indencia ISSkiingNo dataNo dataNo dataNo dataNo dataYesNoNoN80p 2L Gore-TexRegular?78 cm / 30.75 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 Shell (Men'sRunningN/ANo dataNo dataNo dataNo dataNoNoNo13D 3L Gore-TexTrim190 g / 6.7 oz73 cm / 28.75 inNo
    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
    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 (Women's)Skiing16/-93/105/105/109/10ReviewNoNoYesHadron 2L Gore-Tex InfiniumRegular515 g / 1 lb 2.2 oz79 cm / 31 inNo
    Sabre (Men's)SkiingN/A8/108/107/102/10ReviewYesNoNoN80p-X 3L Gore-TexRegular705 g / 1 lb 8.9 oz79 cm / 31 inNo
    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 inYes
    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 AR (Women's)SkiingN/A7/108/107/107/10ReviewYesNoNoN70p 3L Gore-TexRegular590 g / 1 lb 4.8 oz72.5 cm / 28.5 inYes
    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 LT (Women's)SkiingN/A7/108/107/108/10ReviewYesNoNoN80p 3L Gore-TexRegular565 g / 1 lb 3.9 oz73.5 cm / 29 inYes
    Sentinel Relaxed (Women's)SkiingN/ANo dataNo dataNo dataNo dataYesNoNoN80p 3L Gore-TexRegular655 g / 1 lb 7.1 oz?No
    Shashka Stretch (Women's)SkiingN/ANo dataNo dataNo dataNo dataYesNoNoN70p Gore-Tex InfiniumTrim670 g / 1 lb 7.6 oz71 cm / 28 inYes
    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
    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. 

    Nuclei vs Proton: Packability 

    Unfortunately, none of the Protons offer packability. 

    Both Nuclei come with attached stuff sacks. 

    Both Nuclei come with an attached stuff sack. They take place inside the dump pocket when not in use. Image belongs to Nuclei SV. 

    Nuclei SV is packed larger. 

    • Packed sizes: 
      • Nuclei SV: 11 in (or 28 cm) length x 7.1 in (or 18 cm) diameter
      • Nuclei (aka FL): 10.2 in (or 26 cm) length x 5.1 in (or 13 cm) diameter

    See images below. 

    Nuclei vs Proton: Nuclei packed sizes
    Nuclei vs Proton: Nuclei packed sizes (front)

    Both offer a reinforced loop when packed (see packed sizes image). 

    Nuclei vs Proton: Pockets 

    Let's start with Protons. 

    • Proton Hw: 
      • Hand warmers: 9.1 in (or 23 cm) x 8.3 in (or 21 cm) 
      • Internal dump pockets: 7.9 in (or 20 cm) x 8.3 in (or 21 cm)
      • External chest pockets: See image.
    • Proton:
      • Hand warmers: 9.4 in (or 24 cm) height x 7.5 in (or 19 cm) width
      • External chest pocket: See image. 
    • Proton Lw:
      • Hand warmers: 10.26 inches (or 26 cm) height x 7.1 inches (18 cm) width
      • External chest pocket: See image. 

    Proton and Proton Lw offers 1, Proton Hw offers 2 chest pockets. 

    Nuclei vs Proton: Protons pockets
    • Nuclei SV:
      • Hand warmers: 11.8 in (or 30 cm) x 7.5 in (or 19 cm)
      • External zippered chest pocket: 11 in (or 28 cm) x 8.3 in (or 21 cm)
      • Dump pockets: 7.5 in (or 19 cm) x 10.2 in (or 26 cm)
    • Nuclei (aka FL): 
      • Hand warmers: 7.5 in (or 19 cm) x 7.9 in (or 20 cm)
      • Dump pockets: 7.5 in (or 19 cm) x 8.7 in (or 22 cm)

    Nuclei vs Proton: Cuffs

    Nuclei FL is different than the other four. One is not better than the other, it's simply up to you. 

    Nuclei vs Proton: Nuclei cuffs

    Left: Nuclei (aka FL). Right: Nuclei SV. 

    Nuclei vs Proton: Proton Cuffs

    Poll results: Best colorways of Proton Series

    Upvote your favorites.

    Proton Lightweight Hoody Men's

    Proton Lightweight Hoody Women's

    Proton Hoody Women's

    Find comparisons at arcteryx.com below. 

    Nuclei (aka FL) vs Proton Lw (aka FL) vs Proton (aka LT): 

  • Nuclei SV vs Proton Hw: 
  • Best colors

    Poll results: Best colorways of Proton Series

    Upvote your favorites.

    Proton Lightweight Hoody Men's

    Proton Lightweight Hoody Women's

    Proton Hoody Women's


    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.