Best Down Jackets: Arc’teryx takes the upper hand

Last updated: May 14, 2025

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 inNobestdownjacketsArc'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 inNobestdownjacketsArc'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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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?NobestdownjacketsFill 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?NobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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?NobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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.

First thing you should know about down jackets is that you should only consider getting one for stationary use, in dry weather

Because, all down jackets offer: 

  • Low breathability, 
  • Poor wet weather performance, 
  • Fragile outer shell.

Always. 

No exceptions. 

If this isn't you, then you should stop reading this post and go check out my Best Synthetic Insulated Jackets article. 

I'd also recommend you to check out my Best Arc'teryx Jackets and Best Patagonia Jackets articles. 

  • Summary & Take-away

Do make sure checking out the given temperature ratings, but still, for most of you... 

My number one recommendations would be from my favorite brand Arc'teryx. Thorium AR (Men's - Women's - read my review) would be my top pick, with the Cerium LT (Men's - Women's - read my reviewbeing the top alternative to it. 

My top non-Arc'teryx pick would be Feathered Friends Eos (Men's - Women's), with Patagonia's Down Sweater (Men's - Women's - read my review) being the top alternative to it.

#Important note: A down jacket will lose its insulating capability under fairly wet conditions. Either from your sweat or wet weather. 

That's why, if you're going to be using them in damp areas, I'd urge you to consider getting a synthetic insulated jacket instead. They're mostly heavier, but perform better in wet conditions. 

Temperature Ratings

The warmth data provided below for each product are obtained either by: 

  • Trying them out, 
  • Analyzing them scientifically,
  • And/or gathering tens of authentic, non-biased offline user experience.
  • Data Set: Temperature Ratings of Down Jackets

Approximate lowest temperatures you can wear each down jacket in the market without feeling uncomfortably cold are... 

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 inNobestdownjacketsArc'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 inNobestdownjacketsArc'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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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?NobestdownjacketsFill 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?NobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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?NobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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 inNobestdownjacketsFill 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.

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

These are only approximate values assuming:

  • you only have a shirt under and no shell over,
  • during daily use (strolls, power walks etc at most - no high output activities), 
  • with enough wind to cause an umbrella to twist in your hand, 
  • and when it's dry out.

If you think you run warmer or colder than the average person, then shift temperature ranges accordingly.

As you see, there's a strong correlation between FP x FW and temperature ratings, but not more than, say, 80%

Let's clarify the reasons behind this. 

Warmth

Warmth is the most important thing you should focus on when getting a down jacket. There are two major factors to it: 

  • Fill power, 
  • Fill weight.

Note that these are major two factors, not only two factors. 

Fill Power

The word "down" is typically mostly referred to as "fill" in down insulated garment language. 

Fill Power refers to the fully expanded end volume of a 1 oz down (goose or duck). It's in cubic inches. 

For example, a 800 FP (fill power) down will end up getting as large as 800 cubic inches when it's fully expanded at rest. 

  • How and why does a higher FP down offers higher warmth?

Because the insulation occurs by trapping air within the vacant spots of down, followed by having that air heated using our body heat. 

So, the higher the volume of trapped air (which is determined by the Fill Power of down), the more air will be heated & work as insulation as a result

In the end, more warmth will be provided. 

By the way... 

Fill power isn't only about warmth level at all. Having said that, all I'm currently trying to accomplish is to decode the nature of warmth in an analytical way. 

Fill Power.

This is why I'm going to skip other roles of fill power and will get back to it later in this post. 

Here's a video that also does a good job explaining fill power: 

Moving on to our other major factor... 

Fill Weight

Fill weight is the amount of down the insulated piece is equipped with. It's just as important as fill power when it comes to warmth.  

Because, just like fill power, also fill weight directly affects the amount of air trapped within the vacant spots of down. 

That said, the role of fill power on other factors (long term warmth, warmth during movement, warmth distribution, compressibility) is significantly greater than fill weight. 

Important: Warmth Calculation

Reminder: Fill power and fill weight are the two most important factors when it comes to warmth. 

On a larger scale, assuming both jackets are equipped with identical synthetic insulation (or none of it), it is possible to make very close estimations by multiplying them when comparing warmth ratings of two different pieces. 

For example...

  • Rab Neutrino Pro offers 227 grams of 800 FP down.
    • 227*800 = 181,600
  • Outdoor Research Alpine Down offers 182 grams of 800 FP down. 
    • 182*800 = 145,600

Since 181,600 is significantly greater than 145,600; it's safe to say that the former will be warmer than the latter. 

Now...

There are reasons why this mostly won't work on a smaller (or sometimes even on a large) scale. 

  • What do you mean by smaller scale?

Comparing two jackets with, say, 125,000 and 120,000 FP * FW values. 

The main reasons include but are not limited to: 

  • Presence of other synthetic insulators,
  • Length,
  • Bagginess,
  • Outer fabric,
  • Fill power (I know this is confusing... ignore it for now).

Let's clarify them briefly. 

Synthetic Reinforcements

This is one of the primary reasons for this. For example, Arc'teryx always uses synthetic insulation strategically in high wear areas for all their down jackets. 

As you can guess, this is part of the reason why they're listed warmer than down jackets with equal FP * FW values. 

Length

In colder weather, it becomes much harder to keep your legs and feet warm than your torso and arms. 

This is why, the longer the hem length, the warmer the jacket will feel. And the difference is pretty noticeable. 

Bagginess

I talked about this more in detail in my Arc'teryx Thorsen vs Therme vs Camosun post

Baggier cut of Cerium SV helps with its incredible warmth. 

Briefly, the amount of trapped air increases as the jacket gets baggier. So more air works as insulation, and ultimately you're kept warmer. 

There certainly is something as "too baggy", though. After some point, more inner volume only holds the warmth back. 

Weather Resistance & Outer Fabric 

Outer fabric is actually much more about weather resistance, but it also affects warmth a little bit. 

As explained earlier, no down jacket is able to offer well weather resistance since they get clumped and loses their loft when they get wet. 

This is the case regardless from getting wet through your sweat or weather conditions. 

That being said, it's still possible to sort them by their strength. But the difference is minimal here - so much that it might not even be noticeable: 

Arato 30 = Perfex Quantum Pro > Perfex Quantum > Arato 10 = Drilite Loft 40D > Arato 7 = Drilite Loft 20D > others. 

Other impacts of Fill Power

Higher FP will retain its loft with minimal loss during movement. Whereas a lower quality (which is a lower FP) down will do a poor job with this. 

For the sake of simplicity and trying not to make this a scientific article, I decided to place equal importance (weight) on fill power and fill weight when calculating FP * FW values. 

But, in reality, I'd actually place more weight on fill power. Maybe squaring the FP and then multiplying it with FW would be a more accurate calculation to yield better results. 


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.