Arc'teryx Proton LT vs Atom LT: How different are they?

This article is revised after Arc'teryx FW23 update.

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In FW23, women's Proton and Atom lines have undergone a naming scheme change.

The suffix "LT" is removed and the suffix "AR" is changed to "Heavyweight". The change, however, is limited to the names only, with the products remaining identical.

Naming scheme of men's counterparts also remain the same.

The consensus when it comes to Proton vs Atom is that Proton LT is a little bit warmer than the Atom LT, owing to its loftier insulation (80 vs 60 gsm Coreloft). It's also a bit more durable and weather resistant. Atom LT, on the other hand, brings side fleece panels to the table, which makes it a little bit more breathable than the Proton LT in return.

Keep in mind that these products are much more similar than they're different. Don't be surprised if you don't recognize any of these differences in practice.

Links:

Much lighter configurations of these jackets such as the Proton FL (Men's - Women's), Atom SL (Men's - Women's) and Proton Hybrid Hoody (Men's - Women's) and the heavier configuration Atom AR (Men's - Women's) have not been included in this article since they have different design intentions and best uses.

Raw Name	Arc'teryx Proton LT	Arc'teryx Atom LT
Name	Arc'teryx Proton LT (Men's - Women's)	Arc'teryx Atom LT (Men's - Women's)
Image
Temp (°F / °C)	37/3	43/6
Breathability	7/10	8/10
Weather Resistance	7/10	6/10
Durability	9/10	7/10
Packability	5/10	5/10
Best pick for	High output activities.
Review	Review	Review
Pit venting?	No	Yes, mesh
Stuffs into itself?	No	No
Two way zipper?	No	No
Size Chart	[Men's / Women's]	[Men's / Women's]
Type	Synthetic	Synthetic
Fill Power	N/A	N/A
Fill Weight (grams)	N/A	N/A
FP x FW	N/A	N/A
Synthetic Insulator (SI)	Coreloft Compact	Coreloft Continuous
SI Amount	80 g/m2 + 60 g/m2	60 g/m²
Face Fabric	Fortius Air 20	20D Tyono
Activity	Climbing	All Round
Fit	Trim	Trim
Weight	375 g / 13.2 oz	375 g / 13.2 oz
Length (CB)	75 cm / 29.4 in	74 cm / 29.1 in
arc-mens-url	https://www.arcteryx.com/us/en/shop/mens/proton-lt-hoody	https://www.arcteryx.com/us/en/shop/mens/atom-lt-hoody
arc-womens-url	https://www.arcteryx.com/us/en/shop/womens/proton-hoody	https://www.arcteryx.com/us/en/shop/womens/atom-hoody
pat-mens-url
pat-womens-url
rei-mens-url	https://www.rei.com/product/154873	https://www.rei.com/product/175332
rei-womens-url	https://www.rei.com/product/152547	https://www.rei.com/product/174720
backcountry-mens-url
backcountry-womens-url
amazon-mens-url	https://www.amazon.com/Arcteryx-Proton-Jacket-Glade-Large/dp/B08BJFXW1J	https://www.amazon.com/Arcteryx-24109-Atom-LT-Jacket/dp/B08BJHB631
amazon-womens-url	https://www.amazon.com/Arcteryx-Lightweight-Breathable-synthetically-Insulated/dp/B0973FDVWV	https://www.amazon.com/Arcteryx-24112-Atom-LT-Jacket/dp/B08BJFFFB4
image-url	https://images.arcteryx.com/F22/1350x1710/Proton-LT-Hoody-Distortion.jpg	https://images.arcteryx.com/F22/1350x1710/Atom-LT-Hoody-Forage.jpg

If you're interested in reading more about them, too; click through:

Arc'teryx Jackets: Temperature Ratings

Name	Est. Temp (F/C)	Review	Pit venting?	Stuffs into itself?	Two way zipper?	Type	Fill Power	Fill Weight (grams)	Fill Volume (FP x FW)	Synthetic Insulator (SI)	SI Amount	Face Fabric	Activity	Fit	Weight	Length (CB)
Arc'teryx Alpha (Men's - Women's)	-18/-28	Review	No	Yes	Yes	Down	850	296	251,600	Coreloft	90 g/m²	N30r 2L GoreTex Infinium	Climbing	Regular	805 g / 1 lb 12.4 oz	86 cm / 34 in
Feathered Friends Khumbu	-17/-27		No	Yes	No	Down	900	378	340,200	Primaloft Gold	200 g	Pretex Shield XT	All Round	Regular	960 g / 2 lb 2 oz	?
Arc'teryx Ceres SV (Men's - Women's)	-15/-26	Review	No	Yes	Yes	Down	850	240	204,000	Coreloft	?	Arato 30	All Round	Regular	880 g / 1 lb 15 oz	86 cm / 34 in
Mountain Equipment K7 (Men's)	-13/-25		No	Yes	Yes	Down	800	300	240,000	N/A	N/A	30D Drilite	All Round	Regular	820 g / 1 lb 13 oz	76 cm / 30 in
Rab Positron Pro (Men's)	-13/-25		No	Yes	Yes	Down	800	300	240,000	N/A	N/A	40D Pertex Quantum Pro	All Round	Regular	740 g / 1 lb 10 oz	85 cm / 33.5 in
Arc'teryx Therme SV (Men's)	-11/-24	Review	No	No	Yes	Parka	750	211	158,250	Coreloft	60 g/m²	2L Gore-Tex	Around Town	Regular	1.072 kg / 2 lb 5.8 oz	96 cm / 37.75 in
Patagonia Grade VII (Men's)	-11/-24		No	No	Yes	Down	800	335	268,000	N/A	N/A	1.2 oz 15 & 20D Perfex Quantum	Around Town	Regular	743 g / 1 lb 10.1 oz	83 cm / 32.5 in
Arc'teryx Firebee AR (Men's - Women's)	-10/-23	Review	No	Yes	Yes	Down	800	225	180,000	N/A	N/A	Arato 7 & 10	All Round	Regular	680 g / 1 lb 8 oz	79 cm / 31 in
Mountain Equipment Exo (Men's)	-10/-23		No	Yes	Yes	Down	800	265	212,000	N/A	N/A	Nylon	All Round	Regular	770 g / 1 lb 11.2 oz	79 cm / 31 in
Arc'teryx Thorsen (Men's)	-7/-22	Review	No	No	Yes	Parka	750	192	144,000	Coreloft	60 g/m²	90D 2L Gore-Tex	Around Town	Regular	1.1 kg / 2 lb 5.4 oz	91 cm / 36 in
Patagonia Frozen Range (Men's - Women's)	-6/-21	Review	No	No	No	Parka	700	268	187,600	N/A	N/A	4 oz 75-denier polyester	Around Town	Regular	1.253 kg / 2 lb 12.2 oz	84 cm / 33 in
Mountain Equipment Li. Ec. (Men's - Women's)	-5/-20		No	No	Yes	Down	700	295	206,500	N/A	N/A	50D Drilite	All Round	Regular	822 g / 1 lb 13 oz	72 cm / 28 in
Arc'teryx Patera Long (Women's)	-2/-19		No	No	Yes	Parka	750	74	55,500	Coreloft	60 + 80 g/m²	2L Gore-Tex	Around Town	Regular	1.1 kg / 2 lb 6.8 oz	117.5 cm / 46.25 in
Rab Neutrino Pro (Men's - Women's)	-2/-19		No	Yes	Yes	Down	800	212	169,600	N/A	N/A	20D Pertex Quantum Pro	All Round	Regular	585 g / 1 lb 8.6 oz	77 cm / 30.3 in
Arc'teryx Dually Belay (Men's)	0/-18	Review	No	Yes	Yes	Synthetic	N/A	N/A	N/A	ThermaTek	92 g/m²	30D Nylon	Around Town	Regular	705 g / 1 lb 9 oz	84 cm / 33 in
Arc'teryx Centrale (Women's)	0/-18	Review	No	No	Yes	Parka	750	157	117,750	Coreloft	60 g/m²	N90p Nylon	Around Town	Regular	885 g / 1 lb 15.2 oz	95 cm / 37.5 in
Arc'teryx Camosun (Men's)	0/-18	Review	No	No	No	Parka	750	105	78,750	Coreloft	140 g/m²	N150p-X Gore-Tex	Around Town	Trim	960 g / 2 lb 1.9 oz	80 cm / 31.5 in
Arc'teryx Cerium SV (Men's)	0/-18	Review	No	Yes	No	Down	850	162	137,700	Coreloft	80 + 140 g/m²	Arato 7 & 10	All Round	Regular	415 g / 14.6 oz	69.5 cm / 27.4 in
Arc'teryx Revet (Men's)	2/-17		No	No	Yes	Parka	750	?		N/A	N/A	20d nylon/spandex double weave	Around Town	Regular	755 g / 1 lb 10.6 oz	91 cm / 36 in
Arc'teryx Piedmont (Men's)	3/-16		No	Yes	Yes	Parka	750	218	163,500	N/A	N/A	Arato 10	Around Town	Regular	515 g / 1 lb 2.2 oz	82 cm / 32.25 in
Arc'teryx Fission SV (Men's - Women's)	3/-16	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	90 + 65 g/m²	N80p-X Gore-Tex 2L	All Round	Regular	890 g / 1 lb 15.4 oz	81 cm / 31.8 in
Arc'teryx Alpha Lightweight (Men's)	3/-16		No	Yes	Yes	Down	850	117	99,450	Coreloft Compact	40 g/m²	Hadron 2L Gore-Tex Infinium	Climbing	Regular	540 g / 1 lb 3 oz	?
Outdoor Research Sup. Alp. (Men's - Women's)	3/-16		No	No	Yes	Down	800	182	145,600	N/A	N/A	30D Pertex Quantum Pro	All Round	Regular	825 g / 1 lb 13.1 oz	85 cm / 33.5 in
Arc'teryx Alessa Long (Women's)	3/-16		No	No	No	Parka	N/A	N/A	N/A	Coreloft	80 + 120 g/m²	N90p 2L Gore-Tex	Around Town	Regular	1.015 kg / 2 lb 3.8 oz	123 cm / 48.5 in
Patagonia Tres 3-in-1 (Men's - Women's)	3/-16	Review	No	No	No	Parka	700	118	82,600	N/A	N/A	5.5 oz polyester	Around Town	Regular	1.307 kg / 2 lb 14.1 oz	85 cm / 33.5 in
Arc'teryx Radsten Parka (Men's)	3/-16		No	No	No	Parka	N/A	N/A	N/A	Coreloft Compact	120 g/m²	NP100d Gore-Tex 2L	Around Town	Regular	745 g / 1 lb 10.3 oz	82 cm / 32.25 in
Rab Electron Pro (Men's - Women's)	5/-15		No	Yes	Yes	Down	800	180	144,000	N/A	N/A	20D Pertex Quantum Pro	All Round	Regular	525 g / 1 lb 2.5 oz	74 cm / 29 in
Arc'teryx Therme Parka (Men's)	5/-15	Review	No	No	Yes	Parka	750	120	90,000	Coreloft	60 + 80 g/m²	P75d Polyester	Around Town	Regular	991 g / 2 lb 3 oz	85 cm / 33.5 in
Arc'teryx Macai (Men's)	5/-15	Review	Yes, zips	No	No	Down	750	69	51,750	Coreloft Compact	60 + 100 g/m²	N40p-X 3L Gore-Tex	Ski/Snowboard	Regular	1 kg / 2 lb 4 oz	76 cm / 30 in
Arc'teryx Nuclei SV (Men's)	5/-15	Review	No	Yes	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	180 g/m2 + 90 g/m2	Arato 15	Climbing	Regular	600 g / 1 lb 5.2 oz	81 cm / 31.8 in
Patagonia DAS Parka (Men's)	5/-15		No	Yes	Yes	Parka	N/A	N/A	N/A	PrimaLoft Gold Insulation Eco	133 + 40 g	Pertex Quantum Pro	Around Town	Regular	555 g / 1lb 3.6 oz	84 cm / 33 in
Arc'teryx Patera (Women's)	5/-15	Review	No	No	Yes	Parka	750	58	43,500	Coreloft	60 + 80 g/m²	2L Gore-Tex	Around Town	Trim	867 g / 1 lb 14.6 oz	93 cm / 37 in
Black Diamond Access Down (Men's - Women's)	7/-14		No	Yes	Yes	Down	700	155	108,500	N/A	N/A	30D ripstop nylon	All Round	Regular	442 g / 15.6 oz	76 cm / 29.75 in
Arc'teryx Kappa (Men's)	7/-14	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	140 g/m²	N70p Gore Thermium	All Round	Regular	755 g / 1 lb 10.6 oz	80 cm / 31.5 in
Arc'teryx Prema Down Coat (Women's)	7/-14		No	No	Yes	Parka	750	92	69,000	N/A	N/A	Nylon	Around Town	Regular	794 g / 1 lb 12 oz	117 cm / 46.1 in
Arc'teryx Radsten Insulated (Men's)	7/-14		No	No	No	Parka	N/A	N/A	N/A	Coreloft Compact	120 g/m²	NP100d Gore-Tex 2L	Around Town	Regular	715 g / 1 lb 9.2 oz	73 cm / 28.75 in
Rab Microlight Alpine (Men's - Women's)	7/-14		No	Yes	No	Down	700	153	107,100	N/A	N/A	30D Pertex Quantum	All Round	Regular	466 g / 1 lb 0.5 oz	72 cm / 28.5 in
Arc'teryx Thorium (Men's - Women's)	7/-14	Review	No	Yes	Yes	Down	750	140	105,000	Coreloft	80 + 140 g/m²	Arato 30	All Round	Regular	517 g / 1 lb 2.2 oz	71.5 cm / 28.1 in
Feathered Friends Eos	8/-13		No	Yes	No	Down	900	105	94,500	N/A	N/A	Pertex Quantum	All Round	Regular	306 g / 10.8 oz	?
Arc'teryx Thorium AR (Men's - Women's)	8/-13	Review	No	Yes	No	Down	750	130	97,500	Coreloft	80 + 140 g/m²	Arato 30	All Round	Regular	490 g / 1 lb 1.3 oz	72 cm / 28.3 in
Patagonia Macro Puff (Men's - Women's)	8/-13	Review	No	No	No	Synthetic	N/A	N/A	N/A	PlumaFill	135 + 90 g	10D Recycled nylon ripstop	All Round	Regular	435 g / 15.3 oz	79 cm / 31 in
Arc'teryx Macai LT (Men's)	8/-13		Yes, zips	No	No	Down	750	49	36,750	Coreloft Compact	60 g/m²	N40p-X 3L Gore-Tex	Ski/Snowboard	Regular	855 g / 1 lb 14.2 oz	74 cm / 29.1 in
Arc'teryx Seyla (Women's)	8/-13		No	No	Yes	Parka	750	92	69,000	N/A	N/A	Arato 10	Around Town	Regular	507 g / 1 lb. 1.9 oz.	87 cm / 34.4 in
Patagonia Fitz Roy (Men's - Women's)	8/-13		No	Yes	No	Down	800	128	102,400	N/A	N/A	20D Nylon	All Round	Regular	632 g / 1lb 6.3 oz	74 cm / 29 in
Arc'teryx Koda (Men's)	8/-13		No	No	No	Parka	N/A	N/A	N/A	Coreloft	80 + 140 g/m²	N80p-X Gore-Tex	Around Town	Regular	720 g / 1 lb 9.4 oz	75 cm / 29.5 in
Patagonia Vosque 3-in-1 (Women's)	10/-12	Review	No	No	No	Parka	N/A	N/A	N/A	ThermoLite	100 g	65% nylon, 35% polyester	Around Town	Regular	1.360 kg / 3 lb	90 cm / 35.5 in
Patagonia City Storm Down (Men's - Women's)	12/-11		No	Yes	No	Parka	700	191	133,700	N/A	N/A	4.2 oz polyester	All Round	Regular	468 g / 16.5 oz	91 cm / 36 in
Patagonia Jackson Glacier (Men's - Women's)	12/-11	Review	No	No	Yes	Parka	700	141	98,700	N/A	N/A	3.6 oz 50D polyester	Around Town	Regular	880 g / 1 lb 15 oz	79 cm / 31 in
Arc'teryx Sensa (Women's)	14/-10		No	No	Yes	Parka	N/A	N/A	N/A	Coreloft Compact	120 g/m²	NP100d Gore-Tex 2L	Around Town	Relaxed	785 g / 1 lb 11.7 oz	86 cm / 34 in
Patagonia Hi Loft Down (Men's - Women's)	14/-10	Review	No	Yes	No	Down	600	177	106,200	N/A	N/A	1.4 oz 30D polyester	All Round	Regular	540 g / 1 lb 3 oz	76 cm / 30 in
REI Magma 850 Hoodie 2.0 (Men's - Women's)	14/-10		No	Yes	No	Down	850	120	102,000	N/A	N/A	Pertex mini ripstop nylon	All Round	Regular	340 g / 13.75 oz	74 cm / 29.25 in
Arc'teryx Beta Insulated Coat (Women's)	16/-9	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft	80 g/m² + 120 g/m²	2L 40D Gore-Tex	Around Town	Regular	600 g / 1 lb 5.2 oz	?
Arc'teryx Atom AR (Men's - Women's)	18/-8	Review	Yes, mesh	No	No	Synthetic	N/A	N/A	N/A	Coreloft Continuous	120 g/m2 + 80 g/m2 + 60 g/m2	30D Tyono	All Round	Regular	475 g / 1 lb	74 cm / 29.1 in
Patagonia Downdrift (Men's - Women's)	18/-8		No	No	No	Down	600	279	167,400	N/A	N/A	4.2 oz polyester	Around Town	Regular	1.014 kg / 2 lb 3.8 oz	?
Arc'teryx Magnus (Men's)	19/-7		No	No	No	Parka	N/A	N/A	N/A	Coreloft	80 g	N60p Gore-Tex 2L	Around Town	Regular	690 g / 1 lb 8.3 oz	83 cm / 32.5 in
Arc'teryx Agrium (Men's - Women's)	21/-6		No	Yes	No	Down	850	117	99,450	N/A	N/A	Arato	All Round	Regular	365 g / 12.9 oz	75 cm / 29.5 in
Patagonia AlpLight Down (Men's - Women's)	21/-6		No	Yes	No	Down	800	100	80,000	N/A	N/A	0.8 oz 10D polyester	All Round	Slim	270 g / 9.5 oz	74 cm / 29 in
Arc'teryx Beta Insulated (Men's - Women's)	21/-6	Review	Yes, zips	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	80 g/m²	2L 40D Gore-Tex	All Round	Regular	680 g / 1 lb 8 oz	78.5 cm / 31 in
Patagonia Topley (Men's)	23/-5		No	No	Yes	Down	700	172	120,400	N/A	N/A	6 oz polyester	All Round	Regular	1.133 kg / 2 lb 8 oz	77 cm / 30.5 in
Arc'teryx Alpha IS (Men's)	23/-5		No	Yes	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	65 g/m²	N40p-X 2L Gore-Tex	Climbing	Regular	610 g / 1 lb 5.5 oz	78 cm / 30.75 in
Rab Xenon 2.0 (Men's - Women's)	23/-5		No	Yes	Yes	Synthetic	N/A	N/A	N/A	PrimaLoft Silver	60 g	30D Pertex Quantum	All Round	Regular	385 g / 13.6 oz	71.5 cm / 28.1 in
Patagonia Down Sweater (Men's - Women's)	23/-5	Review	No	Yes	No	Down	800	150	120,000	N/A	N/A	1.4 oz 20x30D polyester	All Round	Regular	428 g / 15.1 oz	67 cm / 26.25 in
Arc'teryx Ralle Parka (Men's)	25/-4		No	No	Yes	Parka	N/A	N/A	N/A	Coreloft	80 g/m²	2L 40D Gore-Tex	Around Town	Regular	735 g / 1 lb 9.9 oz	?
Patagonia Silent Down (Men's - Women's)	26/-3	Review	No	No	No	Down	700	109	76,300	N/A	N/A	2.2 oz polyester	Around Town	Regular	585 g / 1 lb 4.7 oz	74 cm / 29 in
Arc'teryx Therme Insulated (Men's)	26/-3	Review	No	No	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	40 g/m²	2L Gore-Tex	Around Town	Regular	960 g / 2 lb 1.9 oz	73 cm / 28.75 in
Arc'teryx Cerium (Men's - Women's)	26/-3		No	Yes	No	Down	850	113	96,050	Coreloft	80 + 100 g/m²	Arato 15	All Round	Trim	335 g / 11.8 oz	?
Mountain Hardwear GW/2 (Men's - Women's)	28/-2		No	Yes	No	Down	800	85	68,000	N/A	N/A	10D Ripstop Nylon	All Round	Trim	250 g / 8.8 oz	70 cm / 27.5 in
Arc'teryx Cerium LT (Men's - Women's)	28/-2	Review	No	Yes	No	Down	850	102	86,700	Coreloft	80 + 100 g/m²	Arato 10	All Round	Trim	305 g / 10.8 oz	72 cm / 28.3 in
Arc'teryx Nuclei FL (Men's - Women's)	32/0	Review	No	Yes	No	Synthetic	N/A	N/A	N/A	Coreloft Continuous	65 g/m²	Arato 10r	Climbing	Trim	325 g / 11.5 oz	75 cm / 29.5 in
Patagonia DAS Light (Men's - Women's)	34/1		No	Yes	Yes	Synthetic	N/A	N/A	N/A	PlumaFill	65 g	0.8-oz 10-denier Pertex Quantum Pro	Climbing	Regular	320 g / 11.3 oz	77 cm / 30.5 in
Patagonia Micro Puff (Men's - Women's)	36/2	Review	No	Yes	No	Synthetic	N/A	N/A	N/A	PlumaFill	65 g	Pertex Quantum	All Round	Trim	298 g / 10.5 oz	75 cm / 29.5 in
Patagonia Isthmus (Men's)	36/2		No	No	No	Parka	N/A	N/A	N/A	ThermoGreen	60 g	4.2 oz polyester	Around Town	Regular	895 g / 1 lb 15.6 oz	70 cm / 27.5 in
Arc'teryx Proton LT (Men's - Women's)	37/3	Review	No	No	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	80 g/m2 + 60 g/m2	Fortius Air 20	Climbing	Trim	375 g / 13.2 oz	75 cm / 29.4 in
Patagonia Nano Puff (Men's - Women's)	37/3	Review	No	Yes	No	Synthetic	N/A	N/A	N/A	PrimaLoft Gold Insulation Eco	60 g	22D Polyester	All Round	Regular	363 g / 12.8 oz	71.5 cm / 28 in
Arc'teryx Norvan SL Ins. (Men's - Women's)	39/4		No	Yes	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	40 g/m²	Gore-Tex ShakeDry	Running	Trim	270 g / 9.5 oz	71.5 cm / 28.1 in
Patagonia Nano Air (Men's - Women's)	41/5	Review	No	No	No	Synthetic	N/A	N/A	N/A	FullRange	60 g	33D Nylon ripstop	All Round	Trim	318 g / 11.2 oz	?
Arc'teryx Atom LT (Men's - Women's)	43/6	Review	Yes, mesh	No	No	Synthetic	N/A	N/A	N/A	Coreloft Continuous	60 g/m²	20D Tyono	All Round	Trim	375 g / 13.2 oz	74 cm / 29.1 in
Arc'teryx Cerium SL (Men's - Women's)	43/6	Review	No	Yes	No	Down	850	58	49,300	Coreloft	40 + 100 g/m²	Arato 7	All Round	Trim	215 g / 7.6 oz	69 cm / 27.2 in
Arc'teryx Proton Hybrid (Men's - Women's)	46/8	Review	No	No	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	40 g/m²	Fortius™ Air 50	All Round	Trim	365 g / 12.9 oz	?
Arc'teryx Proton FL (Men's)	48/9	Review	No	No	No	Synthetic	N/A	N/A	N/A	Octa Loft	94 g/m²	Fortius Air 20	Climbing	Trim	323 g / 11.4 oz	77 cm / 30.4 in
Arc'teryx Atom SL (Men's - Women's)	52/11	Review	Yes, mesh	No	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	40 g/m²	20D Tyono	All Round	Trim	245 g / 8.6 oz	72 cm / 28.3 in
REI Stormhenge Hybrid (Men's - Women's)	Testing		Yes, zips	No	No	Down	850	?		N/A	N/A	40D + 80D	All Round	Regular	900 g / 1 lb 15.75 oz	80 cm / 31.5 in
Arc'teryx Monitor Insulated (Women's)	Testing		No	No	Yes	Parka	N/A	N/A	N/A	Coreloft	80 + 100 g/m²	40D 3L Gore-Tex	Around Town	Oversized	645 g / 1 lb 6.8 oz	93 cm / 37 in
Arc'teryx Coelle (Women's)	Testing		No	No	Yes	Parka	N/A	N/A	N/A	Coreloft	80 + 140 g/m²	40D 2L Gore-Tex	Around Town	Regular	460 g / 1 lb 0.2 oz	93 cm / 37 in

View full table at https://outdoorcrunch.com/best-arcteryx-jacket/.

If you're confused now and don't know which jacket best corresponds to your own needs, then follow the advice given in https://arcteryx.com/us/en/shop/jacket-finder/.

The temperature ratings in this list are intended to represent the lowest temperatures you can wear each jacket without feeling uncomfortably cold.

Keep in mind that these are only approximate values, assuming:

worn over a shirt only and no shell over,
during daily use (strolls, power walks etc at most - no high output activities),
with light wind,
and when it's dry out.

These values applicable to your torso only. Your hands, legs and feet are still subject to their own additional insulation.

The best practice is usually to use this table for comparing each jacket to one another, rather than pinpointing their ratings.

Also, ratings will best respond to males. As most women tend to run colder than men, for women, shifting these ratings a bit is recommended.

Always opt for the warmer option when in doubt. For jackets with Atom AR level warmth and beyond, recommended is almost always the hooded models.

Also see: Arc'teryx Shells

Name	Bottom line	Activity	Review	Breathability	Weather Res.	Durability	Packability	Temp (F/C)	Pit zips?	Two way zipper?	Stuffs into itself?	Hood?	Face Fabric	Fit	Weight	Length	Measurements
Alpha FL (Men's - Women's)		Climbing		4/10	5/10	6/10	10/10	N/A	No	No	Yes	StormHood	Hadron 3L Gore-Tex	Trim	209 g / 7.4 oz	76.5 cm / 30 in	[Men's / Women's]
Alpha SL (Men's - Women's)		Climbing		3/10	4/10	6/10	9/10	N/A	No	No	Yes	StormHood	N40p 3L Gore-Tex	Trim	326 g / 11.5 oz	77.5 cm / 30.5 in	[Men's / Women's]
Alpha AR (Men's - Women's)	Go-to climbing harshell.	Climbing	Review	8/10	7/10	8/10	4/10	N/A	Yes	No	No	StormHood	N40d & N80d Most Rugged 3L Gore-Tex Pro	Regular	430 g / 15.2 oz	79.5 cm / 31.25 in	[Men's]
Alpha SV (Men's - Women's)	Strongest climbing hardshell.	Climbing	Review	8/10	10/10	10/10	3/10	N/A	Yes	No	No	StormHood	N100d Most Rugged 3L Gore-Tex Pro	Regular	510 g / 1 lb 2 oz	78 cm / 30.75 in	[Men's]
Alpha IS (Men's)		Climbing		7/10	5/10	5/10	8/10	23/-5	No	Yes	Yes	StormHood	N40p-X 2L Gore-Tex	Regular	610 g / 1 lb 5.5 oz	78 cm / 30.75 in
Beta (Men's - Women's)		All Round		5/10	5/10	4/10	5/10	N/A	No	No	No	StormHood	N30p-X 3L Gore-Tex	Fitted	300 g / 10.6 oz	76 cm / 30 in
Beta Long (Men's)		All Round	Review	5/10	8/10	8/10	3/10	N/A	No	No	No	StormHood	N80p 3L Gore-Tex	Regular	441 g / 15.6 oz	85 cm / 33.5 in
Beta Coat (Women's)		All Round		7/10	5/10	4/10	5/10	N/A	No	Yes	No	StormHood	3L Gore-Tex	Regular	320 g / 11.3 oz	?	[Men's / Women's]
Beta LT Hadron (Men's - Women's)		All Round		5/10	5/10	4/10	5/10	N/A	No	No	No	StormHood	Hadron 3L Gore-Tex	Fitted	255g / 9 oz	76 cm / 30 in
Beta LT (Men's - Women's)	Beta AR alternative.	All Round	Review	8/10	7/10	8/10	5/10	N/A	Yes	No	No	StormHood	N40d 3L Gore-Tex	Fitted	395 g / 13.9 oz	76 cm / 30 in
Beta Insulated (Men's - Women's)	Best insulated shell.	All Round		10/10	4/10	4/10	2/10	21/-6	Yes	Yes	No	StormHood	N40d 2L Gore-Tex	Regular	680 g / 1 lb 8 oz	78.5 cm / 31 in	[Men's / Women's]
Beta Insulated Coat (Women's)	Beta Insulated alternative.	All Round		7/10	4/10	4/10	2/10	16/-9	No	Yes	No	StormHood	N40d 2L Gore-Tex	Regular	600 g / 1 lb 5.2 oz	?	[Men's / Women's]
Beta AR (Men's - Women's)	Go-to all-round harshell.	All Round	Review	8/10	8/10	8/10	4/10	N/A	Yes	No	No	DropHood	N40r-X & N80p-X Most Rugged 3L Gore-Tex Pro	Regular	460 g / 1 lb	76 cm / 30 in
Beta SV (Men's - Women's)	Strongest all-round harshell.	All Round	Review	8/10	10/10	9/10	3/10	N/A	Yes	No	No	StormHood	N80p-X Most Rugged 3L Gore-Tex Pro	Regular	495 g / 1 lb 1.5 oz	79 cm / 31 in	[Men's / Women's]
Alpine Guide (Men's - Women's)		All Round		8/10	10/10	9/10	3/10	N/A	Yes	No	No	StormHood	N80d-X Most Rugged 3L Gore-Tex Pro	Regular	480g / 1 lb 0.9 oz	?	[Men's]
Gamma SL (Men's - Women's)	A trimmer Gamma LT.	All Round	Review	7/10	2/10	6/10	5/10	N/A	No	No	No	StormHood	Fortius 1.0	Trim	310 g / 10.9 oz	74 cm / 29.1 in	[Men's / Women's]
Gamma LT (Men's)	A fleeceless, trimmer Gamma MX.	All Round	Review	7/10	3/10	7/10	3/10	N/A	No	No	No	StormHood	Wee Burly	Regular	545 g / 1 lb 3.2 oz	76 cm / 30 in	[Men's / Women's]
Gamma MX (Men's - Women's)	A softshell with a fleece.	All Round	Review	6/10	4/10	8/10	3/10	N/A	No	No	No	StormHood	Fortius 2.0	Regular	555 g / 1 lb 3.6 oz	74 cm / 29.1 in	[Men's / Women's]
Rush (Men's - Women's)	Go-to ski jacket.	Skiing	Review	8/10	9/10	9/10	3/10	N/A	Yes	No	No	StormHood	N80p-X & N100p-X 3L Most Rugged Gore-Tex Pro	Regular	590 g / 1 lb 4.8 oz	79.5 cm / 31.25 in	[Men's]
Sabre (Men's)	Alternative to Rush.	Skiing		8/10	8/10	8/10	2/10	N/A	Yes	No	No	StormHood	N80p-X 3L Gore-Tex	Regular	705 g / 1 lb 8.9 oz	79 cm / 31 in
Sentinel (Women's)		Skiing		8/10	8/10	8/10	2/10	N/A	Yes	No	No	StormHood	N70p 3L Gore-Tex	Regular	370 g / 13.1 oz	?
Macai (Men's)	Go-to insulated ski jacket.	Skiing	Review	10/10	8/10	9/10	1/10	5/-15	Yes	No	No	DropHood	N40p-X 3L Gore-Tex	Regular	1 kg / 2 lb 3.3 oz	75 cm / 29.5 in
Macai LT (Men's)	A lighter Macai with StormHood.	Skiing		8/10	7/10	8/10	1/10	8/-13	Yes	No	No	StormHood	N40p-X 3L Gore-Tex	Regular	855 g / 1 lb 14.2 oz	?	[Men's]
Andessa (Women's)	Go-to insulated ski jacket.	Skiing		10/10	Testing	Testing	1/10	8/-13	Yes	No	No	DropHood	N40d 3L Gore-Tex	Trim	869 g / 1 lb 14.7 oz	?
Andessa Shell (Women's)	Non-insulated Andessa.	Skiing		5/10	Testing	Testing	3/10	N/A	No	No	No	DropHood	N70p 3L Gore-Tex	Trim	560 g / 1 lb 3.8 oz	?
Theriss Down (Women's)		Skiing		8/10	6/10	7/10	2/10	Testing	Yes	No	No	StormHood	N80p 2L Gore-Tex	Regular	709 g / 1 lb 9 oz	?
Rush IS (Women's)	An insulated Rush.	Skiing		5/10	Testing	Testing	9/10	16/-9	No	No	Yes	StormHood	Gore-Tex Infinium	Regular	515 g / 1 lb 2.2 oz	?
Sentinel IS (Women's)		Skiing		Testing	Testing	Testing	Testing	21/-6	Yes	No	No	StormHood	N80p 2L Gore-Tex	Regular	600 g / 1 lb 5.2 oz	?	[Women's]
Ski Guide (Men's - Women's)		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	DropHood	N80d Most Rugged 3L Gore-Tex Pro	Regular	570 g / 1 lb 4.1 oz	?
Micon Heather		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	StormHood	NP100-d 3L Gore-Tex	Regular	685 g / 1 lb 8.2 oz	83 cm / 32.5 in	[Men's]
Micon (Men's)		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	StormHood	N80p 3L Gore-Tex	Regular	685 g / 1 lb 8.2 oz	83 cm / 32.5 in	[Men's]
Cassiar (Men's)		Skiing	Review	8/10	7/10	8/10	3/10	N/A	Yes	No	No	DropHood	N70p 3L Gore-Tex	Trim	820 g / 1 lb 12.9 oz	74.5 cm / 29.3 in	[Women's]
Cassiar LT (Men's)		Skiing	Review	6/10	6/10	6/10	5/10	N/A	Yes	No	No	DropHood	N70p 3L Gore-Tex	Trim	605 g / 1 lb 5.3 oz	75 cm / 29.5 in	[Women's]
Ravenna (Women's)		Skiing	Review	8/10	7/10	8/10	3/10	N/A	Yes	No	No	DropHood	N70s-4 3L Gore-Tex	Trim	725 g / 1 lb 9.6 oz	69.5 cm / 27.4 in	[Men's]
Ravenna LT (Women's)		Skiing	Review	6/10	6/10	6/10	5/10	N/A	Yes	No	No	DropHood	N70p 3L Gore-Tex	Trim	540 g / 1 lb 3 oz	69 cm / 27.2 in	[Men's]
Procline (Men's)		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	StormHood	N70p Gore-Tex Infinium	Trim	720 g / 1 lb 9.4 oz	76 cm / 30 in	[Women's]
Shashka Stretch (Women's)		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	StormHood	N70p Gore-Tex Infinium	Trim	670 g / 1 lb 7.6 oz	71 cm / 28 in	[Women's]
Sabre AR (Men's)		Skiing	Review	7/10	8/10	7/10	7/10	N/A	Yes	No	No	StormHood	N70p 3L Gore-Tex	Regular	700 g / 1 lb 8.7 oz	79 cm / 31 in	[Men's]
Sentinel AR (Women's)		Skiing	Review	7/10	8/10	7/10	7/10	N/A	Yes	No	No	StormHood	N70p 3L Gore-Tex	Regular	590 g / 1 lb 4.8 oz	72.5 cm / 28.5 in	[Women's]
Sabre LT (Men's)		Skiing	Review	7/10	8/10	7/10	8/10	N/A	Yes	No	No	StormHood	N80p 3L Gore-Tex	Regular	660 g / 1 lb 7.3 oz	83 cm / 32.5 in
Sentinel LT (Women's)		Skiing	Review	7/10	8/10	7/10	8/10	N/A	Yes	No	No	StormHood	N80p 3L Gore-Tex	Regular	565 g / 1 lb 3.9 oz	73.5 cm / 29 in
Incendia (Women's)		Skiing	Review	8/10	9/10	9/10	3/10	N/A	Yes	No	No	StormHood	NP100d 3L Gore-Tex	Trim	610 g / 1 lb 5.5 oz	79 cm / 31 in	[Women's]
Indencia IS		Skiing		Testing	Testing	Testing	Testing	Testing	Yes	No	No	StormHood	N80p 2L Gore-Tex	Regular	?	78 cm / 30.75 in	[Men's / Women's]
Norvan LT (Men's - Women's)	Go-to running jacket.	Running		5/10	5/10	8/10	6/10	N/A	No	No	No	Standard	N13p 3L Gore-Tex	Fitted	190 g / 6.7 oz	?	[Women's]
Squamish (Men's - Women's)	Trimmer, lighter, packable running jacket.	Running	Review	5/10	4/10	7/10	9/10	N/A	No	No	Yes	StormHood	30D Tyono	Trim	140 g / 4.9 oz	77.5 cm / 30.5 in	[Women's]
Norvan SL Ins. (Women's)		Running		Testing	Testing	Testing	Testing	39/4	No	No	Yes	Standard	Gore-Tex ShakeDry	Trim	270 g / 9.5 oz	71.5 cm / 28.1 in	[Women's]
Cita (Women's)		Running	Review	7/10	4/10	5/10	10/10	N/A	No	No	Yes	Standard	Lumin	Trim	120 g / 4.2 oz	67.5 cm / 26.5 in	[Men's]
Cita SL (Women's)		Running	Review	7/10	4/10	4/10	10/10	N/A	Yes	No	Yes	Standard	Permeair 20	Trim	65 g / 2.3 oz	61.5 cm / 24.2 in	[Men's]
Incendo (Men's)		Running	Review	7/10	4/10	5/10	10/10	N/A	No	No	Yes	Standard	Lumin	Trim	125 g / 4.4 oz	?
Incendo SL (Men's)		Running	Review	7/10	4/10	4/10	10/10	N/A	No	No	Yes	Standard	Permair 20 & Canim	Trim	80 g / 2.8 oz	73 cm / 28.75 in	[Men's / Women's]
Incendo Airshell		Running		Testing	Testing	Testing	Testing	N/A	No	No	Yes	Standard	?	?	?	?	[Men's]
Norvan SL (Men's - Women's)		Running	Review	7/10	6/10	8/10	8/10	N/A	No	No	Yes	Standard	Gore-Tex Infinium	Trim	120 g / 4.2 oz	77 cm / 30.4 in	[Women's]
Trino SL (Men's)		Running	Review	8/10	5/10	7/10	6/10	N/A	No	No	No	Standard	Gore-Tex Infinium	Trim	340 g / 12 oz	74 cm / 29.1 in	[Men's / Women's]
Trino SL Anorak (Women's)		Running	Review	8/10	7/10	8/10	7/10	N/A	No	No	No	Standard	Gore-Tex Infinium	Trim	290 g / 10.2 oz	65 cm / 25.5 in	[Men's / Women's]
Nodin (Men's - Women's)		Running		8/10	5/10	5/10	10/10	N/A	No	No	Yes	Standard	20D Tyono	Trim	155 g / 5.5 oz	75 cm / 29.5 in	[Men's / Women's]
Solano (Men's - Women's)		Around Town	Review	Testing	Testing	Testing	Testing	N/A	No	No	No	Standard	Gore-Tex Infinium	Relaxed	355 g / 12.5 oz	72 cm / 28.3 in
Venda Anorak (Women's)		Around Town		Testing	Testing	Testing	Testing	N/A	No	No	No	Standard	Gore-Tex	Relaxed	255 g / 9 oz	75.5 cm / 29.7 in
Zeta FL (Men's - Women's)		Hiking		4/10	6/10	4/10	6/10	N/A	No	No	No	StormHood	N20r 2L Gore-Tex	Trim	221 g / 7.8 oz	76 cm / 30 in	[Men's / Women's]
Zeta SL (Men's - Women's)		Hiking	Review	3/10	5/10	4/10	5/10	N/A	No	No	No	StormHood	2L Gore-Tex	Trim	310 g / 10.9 oz	77.8 cm / 30.6 in	[Men's]
Zeta LT (Men's - Women's)		Hiking		5/10	7/10	8/10	5/10	N/A	No	No	No	StormHood	N40P-X 3L Gore-Tex	Trim	335 g / 11.8 oz	78 cm / 30.75 in	[Men's]
Zeta AR (Men's)		Hiking		7/10	8/10	7/10	4/10	N/A	Yes	No	No	StormHood	3L Gore-Tex	Regular	425 g / 15 oz	80 cm / 31.5 in

Best uses of Atom LT and Proton LT are the same: High output activities.

You can see this in Arc'teryx's Naming Scheme Page as well - for both "Atom" and "Proton".

Arc'teryx Proton LT.

I'd recommend you to base your decision when it comes to Proton LT vs Atom LT primarily on what you're planning to do with the jacket, your view when it comes to side fleece panels, and lastly, your taste when it comes to the looks.

Because of superior warmth and abrasion resistance capability of Proton LT, I think that it's mostly the better pick for climbing and skiing in not-so-cold-but-still-chilly days.

Latest on the blog:

13 Mar 2023: I've been to Pfander and floodplain forests with my Nuclei SV
13 Dec 2022: Arc'teryx Alpha Parka Review: The most impressive jacket of all time
8 Dec 2022: Arc'teryx ReGEAR: OutdoorCrunch exclusive promo code!
7 Nov 2022: 2023 Thorium Hoody is in - as well as the new Thorium Parka (yes, parka)
2 Nov 2022: Beta Insulated Jacket: Pit zips AND two way zipper!
7 October 2022: Proton Hybrid Hoody is live! The ultimate do it all?
5 October 2022: DropHood vs StormHood: Pros/cons and best uses
5 September 2022: Reviewing Arc'teryx Fall Winter 22/23 Gear
5 August 2022: 5 things all Arc'teryx newbies should know

#A sidenote here: Arc'teryx's PDF guide to jackets is GOOOLLLLDDDDD. Absolutely check that out too if you're interested in buying one.

Atom LT, on the other hand, is mostly the better choice if you run warm and would love side fleece panels for increased breathability.

Quick Navigation

Atom LT 2020 Revision

Proton LT 2019 Revision

Fortius 40 vs 20

Coreloft Continuous vs Compact

Results

Conclusion

Transcript of Customer Service Chat for 2020 Atom LT Updates

Now let's get to the differences between this 2019 version Proton LT and Atom LT.

Warmth

Both Atom LT and Proton LT use Coreloft Compact. But Proton LT is equipped with 80 gsm of it in the body and 60 gsm in the hood, whereas the Atom LT is equipped with 60 gsm everywhere.

On top of that, side fleece panels of Atom LT make a great job in terms of increasing breathability, but in return, this also causes the heat to escape.

Proton LT also comes with slightly longer length, which makes a noticeable difference in warmth.

Weather resistance

The face fabric of Proton LT (Fortius Air 20) is more abrasion & weather resistant than that of Atom's (Tyono 20). The suffix number in the end represents the denier - a unit that is used to determine the thickness of fabric.

This makes them equals in the big picture, when you get to the nitty gritty, the Fortius Air consists of 16% elastane, whereas Atom LT is equipped with 6% of it.

Arc'teryx Atom LT.

I don't have any evidence to prove this, so this isn't scientific, but from what I can see, this more of this fiber tend to make the fabric membrane more durable to inclement weather and abrasion.

So, compared to Atom LT, having more resistant face fabrics, Proton LT is more suitable to be worn as a standalone piece (without any extra layers) while climbing, ski mountaineering, etc. It can hug a rock all day and capable of resisting foul weather more than the Atom LT.

Also, both jackets are DWR applied.

What is DWR by the way?

DWR is a coating.

It's basically sprayed on to the surface of these jackets as a finish. It stands for Durable Water Repellent - which means that water will be repelled under wet conditions instead of soaking into the fabric.

DWR also decreases dry time.

It's a good thing these jackets are coated in DWR, but pay attention to the fact that DWR is a coating - meaning that it will wear off over time.

Which is why you might want to invest in a DWR spray such as this one for after treatment.

As you see, there's a strong correlation between FP x FW and temperature ratings, but not more than, say, 80%. I explained why this happens here in this post of mine.

But using more of elastane doesn't only make the fabric more durable...

...it also makes it more breathable. At the same time.

Breathability

Sure, Proton LT's membrane is more breathable than the Atom LT's, but how does that play out in practice?

Well, even though technology has gone a long way in terms of engineering more breathable and durable fabric, more than half of all the breathability we get under a fabric still results from mechanical venting.

Think pit zips, two way front zippers or, in our case, side fleece panels. This makes Atom LT more breathable than the Proton LT.

Links:

Packability

Neither of these jackets have a pocket that they can stuff into.

Layering

It's very popular to layer Atom LT and Proton LT with Beta LT, AR or SV.

Cheatsheet: Arc'teryx Jackets

Use this chart to compare Arc'teryx shells to one another.

Name	Bottom line	Activity	Review	Breathability	Weather Res.	Durability	Packability	Temp (F/C)	Pit zips?	Two way zipper?	Stuffs into itself?	Hood?	Face Fabric	Fit	Weight	Length	Measurements
Alpha FL (Men's - Women's)		Climbing		4/10	5/10	6/10	10/10	N/A	No	No	Yes	StormHood	Hadron 3L Gore-Tex	Trim	209 g / 7.4 oz	76.5 cm / 30 in	[Men's / Women's]
Alpha SL (Men's - Women's)		Climbing		3/10	4/10	6/10	9/10	N/A	No	No	Yes	StormHood	N40p 3L Gore-Tex	Trim	326 g / 11.5 oz	77.5 cm / 30.5 in	[Men's / Women's]
Alpha AR (Men's - Women's)	Go-to climbing harshell.	Climbing	Review	8/10	7/10	8/10	4/10	N/A	Yes	No	No	StormHood	N40d & N80d Most Rugged 3L Gore-Tex Pro	Regular	430 g / 15.2 oz	79.5 cm / 31.25 in	[Men's]
Alpha SV (Men's - Women's)	Strongest climbing hardshell.	Climbing	Review	8/10	10/10	10/10	3/10	N/A	Yes	No	No	StormHood	N100d Most Rugged 3L Gore-Tex Pro	Regular	510 g / 1 lb 2 oz	78 cm / 30.75 in	[Men's]
Alpha IS (Men's)		Climbing		7/10	5/10	5/10	8/10	23/-5	No	Yes	Yes	StormHood	N40p-X 2L Gore-Tex	Regular	610 g / 1 lb 5.5 oz	78 cm / 30.75 in
Beta (Men's - Women's)		All Round		5/10	5/10	4/10	5/10	N/A	No	No	No	StormHood	N30p-X 3L Gore-Tex	Fitted	300 g / 10.6 oz	76 cm / 30 in
Beta Long (Men's)		All Round	Review	5/10	8/10	8/10	3/10	N/A	No	No	No	StormHood	N80p 3L Gore-Tex	Regular	441 g / 15.6 oz	85 cm / 33.5 in
Beta Coat (Women's)		All Round		7/10	5/10	4/10	5/10	N/A	No	Yes	No	StormHood	3L Gore-Tex	Regular	320 g / 11.3 oz	?	[Men's / Women's]
Beta LT Hadron (Men's - Women's)		All Round		5/10	5/10	4/10	5/10	N/A	No	No	No	StormHood	Hadron 3L Gore-Tex	Fitted	255g / 9 oz	76 cm / 30 in
Beta LT (Men's - Women's)	Beta AR alternative.	All Round	Review	8/10	7/10	8/10	5/10	N/A	Yes	No	No	StormHood	N40d 3L Gore-Tex	Fitted	395 g / 13.9 oz	76 cm / 30 in
Beta Insulated (Men's - Women's)	Best insulated shell.	All Round		10/10	4/10	4/10	2/10	21/-6	Yes	Yes	No	StormHood	N40d 2L Gore-Tex	Regular	680 g / 1 lb 8 oz	78.5 cm / 31 in	[Men's / Women's]
Beta Insulated Coat (Women's)	Beta Insulated alternative.	All Round		7/10	4/10	4/10	2/10	16/-9	No	Yes	No	StormHood	N40d 2L Gore-Tex	Regular	600 g / 1 lb 5.2 oz	?	[Men's / Women's]
Beta AR (Men's - Women's)	Go-to all-round harshell.	All Round	Review	8/10	8/10	8/10	4/10	N/A	Yes	No	No	DropHood	N40r-X & N80p-X Most Rugged 3L Gore-Tex Pro	Regular	460 g / 1 lb	76 cm / 30 in
Beta SV (Men's - Women's)	Strongest all-round harshell.	All Round	Review	8/10	10/10	9/10	3/10	N/A	Yes	No	No	StormHood	N80p-X Most Rugged 3L Gore-Tex Pro	Regular	495 g / 1 lb 1.5 oz	79 cm / 31 in	[Men's / Women's]
Alpine Guide (Men's - Women's)		All Round		8/10	10/10	9/10	3/10	N/A	Yes	No	No	StormHood	N80d-X Most Rugged 3L Gore-Tex Pro	Regular	480g / 1 lb 0.9 oz	?	[Men's]
Gamma SL (Men's - Women's)	A trimmer Gamma LT.	All Round	Review	7/10	2/10	6/10	5/10	N/A	No	No	No	StormHood	Fortius 1.0	Trim	310 g / 10.9 oz	74 cm / 29.1 in	[Men's / Women's]
Gamma LT (Men's)	A fleeceless, trimmer Gamma MX.	All Round	Review	7/10	3/10	7/10	3/10	N/A	No	No	No	StormHood	Wee Burly	Regular	545 g / 1 lb 3.2 oz	76 cm / 30 in	[Men's / Women's]
Gamma MX (Men's - Women's)	A softshell with a fleece.	All Round	Review	6/10	4/10	8/10	3/10	N/A	No	No	No	StormHood	Fortius 2.0	Regular	555 g / 1 lb 3.6 oz	74 cm / 29.1 in	[Men's / Women's]
Rush (Men's - Women's)	Go-to ski jacket.	Skiing	Review	8/10	9/10	9/10	3/10	N/A	Yes	No	No	StormHood	N80p-X & N100p-X 3L Most Rugged Gore-Tex Pro	Regular	590 g / 1 lb 4.8 oz	79.5 cm / 31.25 in	[Men's]
Sabre (Men's)	Alternative to Rush.	Skiing		8/10	8/10	8/10	2/10	N/A	Yes	No	No	StormHood	N80p-X 3L Gore-Tex	Regular	705 g / 1 lb 8.9 oz	79 cm / 31 in
Sentinel (Women's)		Skiing		8/10	8/10	8/10	2/10	N/A	Yes	No	No	StormHood	N70p 3L Gore-Tex	Regular	370 g / 13.1 oz	?
Macai (Men's)	Go-to insulated ski jacket.	Skiing	Review	10/10	8/10	9/10	1/10	5/-15	Yes	No	No	DropHood	N40p-X 3L Gore-Tex	Regular	1 kg / 2 lb 3.3 oz	75 cm / 29.5 in
Macai LT (Men's)	A lighter Macai with StormHood.	Skiing		8/10	7/10	8/10	1/10	8/-13	Yes	No	No	StormHood	N40p-X 3L Gore-Tex	Regular	855 g / 1 lb 14.2 oz	?	[Men's]
Andessa (Women's)	Go-to insulated ski jacket.	Skiing		10/10	Testing	Testing	1/10	8/-13	Yes	No	No	DropHood	N40d 3L Gore-Tex	Trim	869 g / 1 lb 14.7 oz	?
Andessa Shell (Women's)	Non-insulated Andessa.	Skiing		5/10	Testing	Testing	3/10	N/A	No	No	No	DropHood	N70p 3L Gore-Tex	Trim	560 g / 1 lb 3.8 oz	?
Theriss Down (Women's)		Skiing		8/10	6/10	7/10	2/10	Testing	Yes	No	No	StormHood	N80p 2L Gore-Tex	Regular	709 g / 1 lb 9 oz	?
Rush IS (Women's)	An insulated Rush.	Skiing		5/10	Testing	Testing	9/10	16/-9	No	No	Yes	StormHood	Gore-Tex Infinium	Regular	515 g / 1 lb 2.2 oz	?
Sentinel IS (Women's)		Skiing		Testing	Testing	Testing	Testing	21/-6	Yes	No	No	StormHood	N80p 2L Gore-Tex	Regular	600 g / 1 lb 5.2 oz	?	[Women's]
Ski Guide (Men's - Women's)		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	DropHood	N80d Most Rugged 3L Gore-Tex Pro	Regular	570 g / 1 lb 4.1 oz	?
Micon Heather		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	StormHood	NP100-d 3L Gore-Tex	Regular	685 g / 1 lb 8.2 oz	83 cm / 32.5 in	[Men's]
Micon (Men's)		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	StormHood	N80p 3L Gore-Tex	Regular	685 g / 1 lb 8.2 oz	83 cm / 32.5 in	[Men's]
Cassiar (Men's)		Skiing	Review	8/10	7/10	8/10	3/10	N/A	Yes	No	No	DropHood	N70p 3L Gore-Tex	Trim	820 g / 1 lb 12.9 oz	74.5 cm / 29.3 in	[Women's]
Cassiar LT (Men's)		Skiing	Review	6/10	6/10	6/10	5/10	N/A	Yes	No	No	DropHood	N70p 3L Gore-Tex	Trim	605 g / 1 lb 5.3 oz	75 cm / 29.5 in	[Women's]
Ravenna (Women's)		Skiing	Review	8/10	7/10	8/10	3/10	N/A	Yes	No	No	DropHood	N70s-4 3L Gore-Tex	Trim	725 g / 1 lb 9.6 oz	69.5 cm / 27.4 in	[Men's]
Ravenna LT (Women's)		Skiing	Review	6/10	6/10	6/10	5/10	N/A	Yes	No	No	DropHood	N70p 3L Gore-Tex	Trim	540 g / 1 lb 3 oz	69 cm / 27.2 in	[Men's]
Procline (Men's)		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	StormHood	N70p Gore-Tex Infinium	Trim	720 g / 1 lb 9.4 oz	76 cm / 30 in	[Women's]
Shashka Stretch (Women's)		Skiing		Testing	Testing	Testing	Testing	N/A	Yes	No	No	StormHood	N70p Gore-Tex Infinium	Trim	670 g / 1 lb 7.6 oz	71 cm / 28 in	[Women's]
Sabre AR (Men's)		Skiing	Review	7/10	8/10	7/10	7/10	N/A	Yes	No	No	StormHood	N70p 3L Gore-Tex	Regular	700 g / 1 lb 8.7 oz	79 cm / 31 in	[Men's]
Sentinel AR (Women's)		Skiing	Review	7/10	8/10	7/10	7/10	N/A	Yes	No	No	StormHood	N70p 3L Gore-Tex	Regular	590 g / 1 lb 4.8 oz	72.5 cm / 28.5 in	[Women's]
Sabre LT (Men's)		Skiing	Review	7/10	8/10	7/10	8/10	N/A	Yes	No	No	StormHood	N80p 3L Gore-Tex	Regular	660 g / 1 lb 7.3 oz	83 cm / 32.5 in
Sentinel LT (Women's)		Skiing	Review	7/10	8/10	7/10	8/10	N/A	Yes	No	No	StormHood	N80p 3L Gore-Tex	Regular	565 g / 1 lb 3.9 oz	73.5 cm / 29 in
Incendia (Women's)		Skiing	Review	8/10	9/10	9/10	3/10	N/A	Yes	No	No	StormHood	NP100d 3L Gore-Tex	Trim	610 g / 1 lb 5.5 oz	79 cm / 31 in	[Women's]
Indencia IS		Skiing		Testing	Testing	Testing	Testing	Testing	Yes	No	No	StormHood	N80p 2L Gore-Tex	Regular	?	78 cm / 30.75 in	[Men's / Women's]
Norvan LT (Men's - Women's)	Go-to running jacket.	Running		5/10	5/10	8/10	6/10	N/A	No	No	No	Standard	N13p 3L Gore-Tex	Fitted	190 g / 6.7 oz	?	[Women's]
Squamish (Men's - Women's)	Trimmer, lighter, packable running jacket.	Running	Review	5/10	4/10	7/10	9/10	N/A	No	No	Yes	StormHood	30D Tyono	Trim	140 g / 4.9 oz	77.5 cm / 30.5 in	[Women's]
Norvan SL Ins. (Women's)		Running		Testing	Testing	Testing	Testing	39/4	No	No	Yes	Standard	Gore-Tex ShakeDry	Trim	270 g / 9.5 oz	71.5 cm / 28.1 in	[Women's]
Cita (Women's)		Running	Review	7/10	4/10	5/10	10/10	N/A	No	No	Yes	Standard	Lumin	Trim	120 g / 4.2 oz	67.5 cm / 26.5 in	[Men's]
Cita SL (Women's)		Running	Review	7/10	4/10	4/10	10/10	N/A	Yes	No	Yes	Standard	Permeair 20	Trim	65 g / 2.3 oz	61.5 cm / 24.2 in	[Men's]
Incendo (Men's)		Running	Review	7/10	4/10	5/10	10/10	N/A	No	No	Yes	Standard	Lumin	Trim	125 g / 4.4 oz	?
Incendo SL (Men's)		Running	Review	7/10	4/10	4/10	10/10	N/A	No	No	Yes	Standard	Permair 20 & Canim	Trim	80 g / 2.8 oz	73 cm / 28.75 in	[Men's / Women's]
Incendo Airshell		Running		Testing	Testing	Testing	Testing	N/A	No	No	Yes	Standard	?	?	?	?	[Men's]
Norvan SL (Men's - Women's)		Running	Review	7/10	6/10	8/10	8/10	N/A	No	No	Yes	Standard	Gore-Tex Infinium	Trim	120 g / 4.2 oz	77 cm / 30.4 in	[Women's]
Trino SL (Men's)		Running	Review	8/10	5/10	7/10	6/10	N/A	No	No	No	Standard	Gore-Tex Infinium	Trim	340 g / 12 oz	74 cm / 29.1 in	[Men's / Women's]
Trino SL Anorak (Women's)		Running	Review	8/10	7/10	8/10	7/10	N/A	No	No	No	Standard	Gore-Tex Infinium	Trim	290 g / 10.2 oz	65 cm / 25.5 in	[Men's / Women's]
Nodin (Men's - Women's)		Running		8/10	5/10	5/10	10/10	N/A	No	No	Yes	Standard	20D Tyono	Trim	155 g / 5.5 oz	75 cm / 29.5 in	[Men's / Women's]
Solano (Men's - Women's)		Around Town	Review	Testing	Testing	Testing	Testing	N/A	No	No	No	Standard	Gore-Tex Infinium	Relaxed	355 g / 12.5 oz	72 cm / 28.3 in
Venda Anorak (Women's)		Around Town		Testing	Testing	Testing	Testing	N/A	No	No	No	Standard	Gore-Tex	Relaxed	255 g / 9 oz	75.5 cm / 29.7 in
Zeta FL (Men's - Women's)		Hiking		4/10	6/10	4/10	6/10	N/A	No	No	No	StormHood	N20r 2L Gore-Tex	Trim	221 g / 7.8 oz	76 cm / 30 in	[Men's / Women's]
Zeta SL (Men's - Women's)		Hiking	Review	3/10	5/10	4/10	5/10	N/A	No	No	No	StormHood	2L Gore-Tex	Trim	310 g / 10.9 oz	77.8 cm / 30.6 in	[Men's]
Zeta LT (Men's - Women's)		Hiking		5/10	7/10	8/10	5/10	N/A	No	No	No	StormHood	N40P-X 3L Gore-Tex	Trim	335 g / 11.8 oz	78 cm / 30.75 in	[Men's]
Zeta AR (Men's)		Hiking		7/10	8/10	7/10	4/10	N/A	Yes	No	No	StormHood	3L Gore-Tex	Regular	425 g / 15 oz	80 cm / 31.5 in

More about this chart: https://outdoorcrunch.com/best-arcteryx-shells/

If you're confused now and don't know which jacket best corresponds to your own needs, then follow the advice given below:

Also see:

Name	Est. Temp (F/C)	Review	Pit venting?	Stuffs into itself?	Two way zipper?	Type	Fill Power	Fill Weight (grams)	Fill Volume (FP x FW)	Synthetic Insulator (SI)	SI Amount	Face Fabric	Activity	Fit	Weight	Length (CB)
Arc'teryx Alpha (Men's - Women's)	-18/-28	Review	No	Yes	Yes	Down	850	296	251,600	Coreloft	90 g/m²	N30r 2L GoreTex Infinium	Climbing	Regular	805 g / 1 lb 12.4 oz	86 cm / 34 in
Feathered Friends Khumbu	-17/-27		No	Yes	No	Down	900	378	340,200	Primaloft Gold	200 g	Pretex Shield XT	All Round	Regular	960 g / 2 lb 2 oz	?
Arc'teryx Ceres SV (Men's - Women's)	-15/-26	Review	No	Yes	Yes	Down	850	240	204,000	Coreloft	?	Arato 30	All Round	Regular	880 g / 1 lb 15 oz	86 cm / 34 in
Mountain Equipment K7 (Men's)	-13/-25		No	Yes	Yes	Down	800	300	240,000	N/A	N/A	30D Drilite	All Round	Regular	820 g / 1 lb 13 oz	76 cm / 30 in
Rab Positron Pro (Men's)	-13/-25		No	Yes	Yes	Down	800	300	240,000	N/A	N/A	40D Pertex Quantum Pro	All Round	Regular	740 g / 1 lb 10 oz	85 cm / 33.5 in
Arc'teryx Therme SV (Men's)	-11/-24	Review	No	No	Yes	Parka	750	211	158,250	Coreloft	60 g/m²	2L Gore-Tex	Around Town	Regular	1.072 kg / 2 lb 5.8 oz	96 cm / 37.75 in
Patagonia Grade VII (Men's)	-11/-24		No	No	Yes	Down	800	335	268,000	N/A	N/A	1.2 oz 15 & 20D Perfex Quantum	Around Town	Regular	743 g / 1 lb 10.1 oz	83 cm / 32.5 in
Arc'teryx Firebee AR (Men's - Women's)	-10/-23	Review	No	Yes	Yes	Down	800	225	180,000	N/A	N/A	Arato 7 & 10	All Round	Regular	680 g / 1 lb 8 oz	79 cm / 31 in
Mountain Equipment Exo (Men's)	-10/-23		No	Yes	Yes	Down	800	265	212,000	N/A	N/A	Nylon	All Round	Regular	770 g / 1 lb 11.2 oz	79 cm / 31 in
Arc'teryx Thorsen (Men's)	-7/-22	Review	No	No	Yes	Parka	750	192	144,000	Coreloft	60 g/m²	90D 2L Gore-Tex	Around Town	Regular	1.1 kg / 2 lb 5.4 oz	91 cm / 36 in
Patagonia Frozen Range (Men's - Women's)	-6/-21	Review	No	No	No	Parka	700	268	187,600	N/A	N/A	4 oz 75-denier polyester	Around Town	Regular	1.253 kg / 2 lb 12.2 oz	84 cm / 33 in
Mountain Equipment Li. Ec. (Men's - Women's)	-5/-20		No	No	Yes	Down	700	295	206,500	N/A	N/A	50D Drilite	All Round	Regular	822 g / 1 lb 13 oz	72 cm / 28 in
Arc'teryx Patera Long (Women's)	-2/-19		No	No	Yes	Parka	750	74	55,500	Coreloft	60 + 80 g/m²	2L Gore-Tex	Around Town	Regular	1.1 kg / 2 lb 6.8 oz	117.5 cm / 46.25 in
Rab Neutrino Pro (Men's - Women's)	-2/-19		No	Yes	Yes	Down	800	212	169,600	N/A	N/A	20D Pertex Quantum Pro	All Round	Regular	585 g / 1 lb 8.6 oz	77 cm / 30.3 in
Arc'teryx Dually Belay (Men's)	0/-18	Review	No	Yes	Yes	Synthetic	N/A	N/A	N/A	ThermaTek	92 g/m²	30D Nylon	Around Town	Regular	705 g / 1 lb 9 oz	84 cm / 33 in
Arc'teryx Centrale (Women's)	0/-18	Review	No	No	Yes	Parka	750	157	117,750	Coreloft	60 g/m²	N90p Nylon	Around Town	Regular	885 g / 1 lb 15.2 oz	95 cm / 37.5 in
Arc'teryx Camosun (Men's)	0/-18	Review	No	No	No	Parka	750	105	78,750	Coreloft	140 g/m²	N150p-X Gore-Tex	Around Town	Trim	960 g / 2 lb 1.9 oz	80 cm / 31.5 in
Arc'teryx Cerium SV (Men's)	0/-18	Review	No	Yes	No	Down	850	162	137,700	Coreloft	80 + 140 g/m²	Arato 7 & 10	All Round	Regular	415 g / 14.6 oz	69.5 cm / 27.4 in
Arc'teryx Revet (Men's)	2/-17		No	No	Yes	Parka	750	?		N/A	N/A	20d nylon/spandex double weave	Around Town	Regular	755 g / 1 lb 10.6 oz	91 cm / 36 in
Arc'teryx Piedmont (Men's)	3/-16		No	Yes	Yes	Parka	750	218	163,500	N/A	N/A	Arato 10	Around Town	Regular	515 g / 1 lb 2.2 oz	82 cm / 32.25 in
Arc'teryx Fission SV (Men's - Women's)	3/-16	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	90 + 65 g/m²	N80p-X Gore-Tex 2L	All Round	Regular	890 g / 1 lb 15.4 oz	81 cm / 31.8 in
Arc'teryx Alpha Lightweight (Men's)	3/-16		No	Yes	Yes	Down	850	117	99,450	Coreloft Compact	40 g/m²	Hadron 2L Gore-Tex Infinium	Climbing	Regular	540 g / 1 lb 3 oz	?
Outdoor Research Sup. Alp. (Men's - Women's)	3/-16		No	No	Yes	Down	800	182	145,600	N/A	N/A	30D Pertex Quantum Pro	All Round	Regular	825 g / 1 lb 13.1 oz	85 cm / 33.5 in
Arc'teryx Alessa Long (Women's)	3/-16		No	No	No	Parka	N/A	N/A	N/A	Coreloft	80 + 120 g/m²	N90p 2L Gore-Tex	Around Town	Regular	1.015 kg / 2 lb 3.8 oz	123 cm / 48.5 in
Patagonia Tres 3-in-1 (Men's - Women's)	3/-16	Review	No	No	No	Parka	700	118	82,600	N/A	N/A	5.5 oz polyester	Around Town	Regular	1.307 kg / 2 lb 14.1 oz	85 cm / 33.5 in
Arc'teryx Radsten Parka (Men's)	3/-16		No	No	No	Parka	N/A	N/A	N/A	Coreloft Compact	120 g/m²	NP100d Gore-Tex 2L	Around Town	Regular	745 g / 1 lb 10.3 oz	82 cm / 32.25 in
Rab Electron Pro (Men's - Women's)	5/-15		No	Yes	Yes	Down	800	180	144,000	N/A	N/A	20D Pertex Quantum Pro	All Round	Regular	525 g / 1 lb 2.5 oz	74 cm / 29 in
Arc'teryx Therme Parka (Men's)	5/-15	Review	No	No	Yes	Parka	750	120	90,000	Coreloft	60 + 80 g/m²	P75d Polyester	Around Town	Regular	991 g / 2 lb 3 oz	85 cm / 33.5 in
Arc'teryx Macai (Men's)	5/-15	Review	Yes, zips	No	No	Down	750	69	51,750	Coreloft Compact	60 + 100 g/m²	N40p-X 3L Gore-Tex	Ski/Snowboard	Regular	1 kg / 2 lb 4 oz	76 cm / 30 in
Arc'teryx Nuclei SV (Men's)	5/-15	Review	No	Yes	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	180 g/m2 + 90 g/m2	Arato 15	Climbing	Regular	600 g / 1 lb 5.2 oz	81 cm / 31.8 in
Patagonia DAS Parka (Men's)	5/-15		No	Yes	Yes	Parka	N/A	N/A	N/A	PrimaLoft Gold Insulation Eco	133 + 40 g	Pertex Quantum Pro	Around Town	Regular	555 g / 1lb 3.6 oz	84 cm / 33 in
Arc'teryx Patera (Women's)	5/-15	Review	No	No	Yes	Parka	750	58	43,500	Coreloft	60 + 80 g/m²	2L Gore-Tex	Around Town	Trim	867 g / 1 lb 14.6 oz	93 cm / 37 in
Black Diamond Access Down (Men's - Women's)	7/-14		No	Yes	Yes	Down	700	155	108,500	N/A	N/A	30D ripstop nylon	All Round	Regular	442 g / 15.6 oz	76 cm / 29.75 in
Arc'teryx Kappa (Men's)	7/-14	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	140 g/m²	N70p Gore Thermium	All Round	Regular	755 g / 1 lb 10.6 oz	80 cm / 31.5 in
Arc'teryx Prema Down Coat (Women's)	7/-14		No	No	Yes	Parka	750	92	69,000	N/A	N/A	Nylon	Around Town	Regular	794 g / 1 lb 12 oz	117 cm / 46.1 in
Arc'teryx Radsten Insulated (Men's)	7/-14		No	No	No	Parka	N/A	N/A	N/A	Coreloft Compact	120 g/m²	NP100d Gore-Tex 2L	Around Town	Regular	715 g / 1 lb 9.2 oz	73 cm / 28.75 in
Rab Microlight Alpine (Men's - Women's)	7/-14		No	Yes	No	Down	700	153	107,100	N/A	N/A	30D Pertex Quantum	All Round	Regular	466 g / 1 lb 0.5 oz	72 cm / 28.5 in
Arc'teryx Thorium (Men's - Women's)	7/-14	Review	No	Yes	Yes	Down	750	140	105,000	Coreloft	80 + 140 g/m²	Arato 30	All Round	Regular	517 g / 1 lb 2.2 oz	71.5 cm / 28.1 in
Feathered Friends Eos	8/-13		No	Yes	No	Down	900	105	94,500	N/A	N/A	Pertex Quantum	All Round	Regular	306 g / 10.8 oz	?
Arc'teryx Thorium AR (Men's - Women's)	8/-13	Review	No	Yes	No	Down	750	130	97,500	Coreloft	80 + 140 g/m²	Arato 30	All Round	Regular	490 g / 1 lb 1.3 oz	72 cm / 28.3 in
Patagonia Macro Puff (Men's - Women's)	8/-13	Review	No	No	No	Synthetic	N/A	N/A	N/A	PlumaFill	135 + 90 g	10D Recycled nylon ripstop	All Round	Regular	435 g / 15.3 oz	79 cm / 31 in
Arc'teryx Macai LT (Men's)	8/-13		Yes, zips	No	No	Down	750	49	36,750	Coreloft Compact	60 g/m²	N40p-X 3L Gore-Tex	Ski/Snowboard	Regular	855 g / 1 lb 14.2 oz	74 cm / 29.1 in
Arc'teryx Seyla (Women's)	8/-13		No	No	Yes	Parka	750	92	69,000	N/A	N/A	Arato 10	Around Town	Regular	507 g / 1 lb. 1.9 oz.	87 cm / 34.4 in
Patagonia Fitz Roy (Men's - Women's)	8/-13		No	Yes	No	Down	800	128	102,400	N/A	N/A	20D Nylon	All Round	Regular	632 g / 1lb 6.3 oz	74 cm / 29 in
Arc'teryx Koda (Men's)	8/-13		No	No	No	Parka	N/A	N/A	N/A	Coreloft	80 + 140 g/m²	N80p-X Gore-Tex	Around Town	Regular	720 g / 1 lb 9.4 oz	75 cm / 29.5 in
Patagonia Vosque 3-in-1 (Women's)	10/-12	Review	No	No	No	Parka	N/A	N/A	N/A	ThermoLite	100 g	65% nylon, 35% polyester	Around Town	Regular	1.360 kg / 3 lb	90 cm / 35.5 in
Patagonia City Storm Down (Men's - Women's)	12/-11		No	Yes	No	Parka	700	191	133,700	N/A	N/A	4.2 oz polyester	All Round	Regular	468 g / 16.5 oz	91 cm / 36 in
Patagonia Jackson Glacier (Men's - Women's)	12/-11	Review	No	No	Yes	Parka	700	141	98,700	N/A	N/A	3.6 oz 50D polyester	Around Town	Regular	880 g / 1 lb 15 oz	79 cm / 31 in
Arc'teryx Sensa (Women's)	14/-10		No	No	Yes	Parka	N/A	N/A	N/A	Coreloft Compact	120 g/m²	NP100d Gore-Tex 2L	Around Town	Relaxed	785 g / 1 lb 11.7 oz	86 cm / 34 in
Patagonia Hi Loft Down (Men's - Women's)	14/-10	Review	No	Yes	No	Down	600	177	106,200	N/A	N/A	1.4 oz 30D polyester	All Round	Regular	540 g / 1 lb 3 oz	76 cm / 30 in
REI Magma 850 Hoodie 2.0 (Men's - Women's)	14/-10		No	Yes	No	Down	850	120	102,000	N/A	N/A	Pertex mini ripstop nylon	All Round	Regular	340 g / 13.75 oz	74 cm / 29.25 in
Arc'teryx Beta Insulated Coat (Women's)	16/-9	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft	80 g/m² + 120 g/m²	2L 40D Gore-Tex	Around Town	Regular	600 g / 1 lb 5.2 oz	?
Arc'teryx Atom AR (Men's - Women's)	18/-8	Review	Yes, mesh	No	No	Synthetic	N/A	N/A	N/A	Coreloft Continuous	120 g/m2 + 80 g/m2 + 60 g/m2	30D Tyono	All Round	Regular	475 g / 1 lb	74 cm / 29.1 in
Patagonia Downdrift (Men's - Women's)	18/-8		No	No	No	Down	600	279	167,400	N/A	N/A	4.2 oz polyester	Around Town	Regular	1.014 kg / 2 lb 3.8 oz	?
Arc'teryx Magnus (Men's)	19/-7		No	No	No	Parka	N/A	N/A	N/A	Coreloft	80 g	N60p Gore-Tex 2L	Around Town	Regular	690 g / 1 lb 8.3 oz	83 cm / 32.5 in
Arc'teryx Agrium (Men's - Women's)	21/-6		No	Yes	No	Down	850	117	99,450	N/A	N/A	Arato	All Round	Regular	365 g / 12.9 oz	75 cm / 29.5 in
Patagonia AlpLight Down (Men's - Women's)	21/-6		No	Yes	No	Down	800	100	80,000	N/A	N/A	0.8 oz 10D polyester	All Round	Slim	270 g / 9.5 oz	74 cm / 29 in
Arc'teryx Beta Insulated (Men's - Women's)	21/-6	Review	Yes, zips	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	80 g/m²	2L 40D Gore-Tex	All Round	Regular	680 g / 1 lb 8 oz	78.5 cm / 31 in
Patagonia Topley (Men's)	23/-5		No	No	Yes	Down	700	172	120,400	N/A	N/A	6 oz polyester	All Round	Regular	1.133 kg / 2 lb 8 oz	77 cm / 30.5 in
Arc'teryx Alpha IS (Men's)	23/-5		No	Yes	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	65 g/m²	N40p-X 2L Gore-Tex	Climbing	Regular	610 g / 1 lb 5.5 oz	78 cm / 30.75 in
Rab Xenon 2.0 (Men's - Women's)	23/-5		No	Yes	Yes	Synthetic	N/A	N/A	N/A	PrimaLoft Silver	60 g	30D Pertex Quantum	All Round	Regular	385 g / 13.6 oz	71.5 cm / 28.1 in
Patagonia Down Sweater (Men's - Women's)	23/-5	Review	No	Yes	No	Down	800	150	120,000	N/A	N/A	1.4 oz 20x30D polyester	All Round	Regular	428 g / 15.1 oz	67 cm / 26.25 in
Arc'teryx Ralle Parka (Men's)	25/-4		No	No	Yes	Parka	N/A	N/A	N/A	Coreloft	80 g/m²	2L 40D Gore-Tex	Around Town	Regular	735 g / 1 lb 9.9 oz	?
Patagonia Silent Down (Men's - Women's)	26/-3	Review	No	No	No	Down	700	109	76,300	N/A	N/A	2.2 oz polyester	Around Town	Regular	585 g / 1 lb 4.7 oz	74 cm / 29 in
Arc'teryx Therme Insulated (Men's)	26/-3	Review	No	No	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	40 g/m²	2L Gore-Tex	Around Town	Regular	960 g / 2 lb 1.9 oz	73 cm / 28.75 in
Arc'teryx Cerium (Men's - Women's)	26/-3		No	Yes	No	Down	850	113	96,050	Coreloft	80 + 100 g/m²	Arato 15	All Round	Trim	335 g / 11.8 oz	?
Mountain Hardwear GW/2 (Men's - Women's)	28/-2		No	Yes	No	Down	800	85	68,000	N/A	N/A	10D Ripstop Nylon	All Round	Trim	250 g / 8.8 oz	70 cm / 27.5 in
Arc'teryx Cerium LT (Men's - Women's)	28/-2	Review	No	Yes	No	Down	850	102	86,700	Coreloft	80 + 100 g/m²	Arato 10	All Round	Trim	305 g / 10.8 oz	72 cm / 28.3 in
Arc'teryx Nuclei FL (Men's - Women's)	32/0	Review	No	Yes	No	Synthetic	N/A	N/A	N/A	Coreloft Continuous	65 g/m²	Arato 10r	Climbing	Trim	325 g / 11.5 oz	75 cm / 29.5 in
Patagonia DAS Light (Men's - Women's)	34/1		No	Yes	Yes	Synthetic	N/A	N/A	N/A	PlumaFill	65 g	0.8-oz 10-denier Pertex Quantum Pro	Climbing	Regular	320 g / 11.3 oz	77 cm / 30.5 in
Patagonia Micro Puff (Men's - Women's)	36/2	Review	No	Yes	No	Synthetic	N/A	N/A	N/A	PlumaFill	65 g	Pertex Quantum	All Round	Trim	298 g / 10.5 oz	75 cm / 29.5 in
Patagonia Isthmus (Men's)	36/2		No	No	No	Parka	N/A	N/A	N/A	ThermoGreen	60 g	4.2 oz polyester	Around Town	Regular	895 g / 1 lb 15.6 oz	70 cm / 27.5 in
Arc'teryx Proton LT (Men's - Women's)	37/3	Review	No	No	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	80 g/m2 + 60 g/m2	Fortius Air 20	Climbing	Trim	375 g / 13.2 oz	75 cm / 29.4 in
Patagonia Nano Puff (Men's - Women's)	37/3	Review	No	Yes	No	Synthetic	N/A	N/A	N/A	PrimaLoft Gold Insulation Eco	60 g	22D Polyester	All Round	Regular	363 g / 12.8 oz	71.5 cm / 28 in
Arc'teryx Norvan SL Ins. (Men's - Women's)	39/4		No	Yes	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	40 g/m²	Gore-Tex ShakeDry	Running	Trim	270 g / 9.5 oz	71.5 cm / 28.1 in
Patagonia Nano Air (Men's - Women's)	41/5	Review	No	No	No	Synthetic	N/A	N/A	N/A	FullRange	60 g	33D Nylon ripstop	All Round	Trim	318 g / 11.2 oz	?
Arc'teryx Atom LT (Men's - Women's)	43/6	Review	Yes, mesh	No	No	Synthetic	N/A	N/A	N/A	Coreloft Continuous	60 g/m²	20D Tyono	All Round	Trim	375 g / 13.2 oz	74 cm / 29.1 in
Arc'teryx Cerium SL (Men's - Women's)	43/6	Review	No	Yes	No	Down	850	58	49,300	Coreloft	40 + 100 g/m²	Arato 7	All Round	Trim	215 g / 7.6 oz	69 cm / 27.2 in
Arc'teryx Proton Hybrid (Men's - Women's)	46/8	Review	No	No	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	40 g/m²	Fortius™ Air 50	All Round	Trim	365 g / 12.9 oz	?
Arc'teryx Proton FL (Men's)	48/9	Review	No	No	No	Synthetic	N/A	N/A	N/A	Octa Loft	94 g/m²	Fortius Air 20	Climbing	Trim	323 g / 11.4 oz	77 cm / 30.4 in
Arc'teryx Atom SL (Men's - Women's)	52/11	Review	Yes, mesh	No	No	Synthetic	N/A	N/A	N/A	Coreloft Compact	40 g/m²	20D Tyono	All Round	Trim	245 g / 8.6 oz	72 cm / 28.3 in
REI Stormhenge Hybrid (Men's - Women's)	Testing		Yes, zips	No	No	Down	850	?		N/A	N/A	40D + 80D	All Round	Regular	900 g / 1 lb 15.75 oz	80 cm / 31.5 in
Arc'teryx Monitor Insulated (Women's)	Testing		No	No	Yes	Parka	N/A	N/A	N/A	Coreloft	80 + 100 g/m²	40D 3L Gore-Tex	Around Town	Oversized	645 g / 1 lb 6.8 oz	93 cm / 37 in
Arc'teryx Coelle (Women's)	Testing		No	No	Yes	Parka	N/A	N/A	N/A	Coreloft	80 + 140 g/m²	40D 2L Gore-Tex	Around Town	Regular	460 g / 1 lb 0.2 oz	93 cm / 37 in

If you want to read more about them simply visit their reviews.

Both jackets are true to size, by the way. So I wouldn't recommend sizing up or down.

Atom LT 2020 Revision

Not much has changed really.

With the 2020 revision, Atom LT is given a dope-dyed liner, a new construction on the cuff and is now 1" (2.5 cm) longer.

So, as a result;

Cuff construction allows for easier on/off and layering,
Durability is slightly increased now owing to Dope-dyed liner (Dope Permeair™ 20 - 100% nylon) - but the difference is really not noticeable at all.

Additionally, Dope Dying is much more environmentally friendly, so Arc'teryx is also reducing their mark on the planet by incorporating it into the production process.

Proton LT 2019 Revision

Fortius 40 vs 20

In order to increase breathability, designers decided to change the insulation material from Fortius 40 to Fortius 20. In English: Fabric is now slightly thinner but also more air-permeable.

This is measured with a metric called CFM (cubic feet per minute). The new Proton LT has a CFM of 40 compared to the CFM of 20 that belongs to the older version.

Coreloft Continuous vs Compact

Because the Coreloft Compact of the revised (new) version is composed of highly crimped fibers, it's more compressible and air-permeable compared to the Coreloft Continuous of the previous version.

The Coreloft Continous, on the other hand, has more fluff at the beginning (so slightly higher CLO value - which means slightly warmer) but can pack down over time meaning that the jacket will eventually lose some of its fluff and warmth a little bit.

We can say that the warmth didn't really change noticeably (if at all).

Continuous is also more durable since it's less air-permeable.

Since the design intent of Proton LT is a highly air-permeable jacket for high output activity, design team decided to switch to Coreloft Compact for air-permeability and packability reasons.

Results

Compared to the previous model, the most recent (2019) version of Proton LT is;

lighter,
more packable,
more breathable,
slightly less durable.

Fit remains the same.

Conclusion

These hoodies are much more similar than they're different. Get the Atom LT if you want slightly higher breathability, and get the Proton LT if you want slightly higher warmth, durability and weather & abrasion resistance.

Links:

If you prefer videos, here's a good review of Atom LT:

That of Proton LT:

Transcript of Customer Service Chat for 2020 Atom LT Updates

Hi there! My name is Camille, how can I help you today?
Hi Camille. I was wondering about the updates that took place for the 2020 revision of Atom LT. Can you list all the changes, please?
Hi there, thanks for chatting. I sure can.
The redesign includes an update to the cuff construction for easier on/off and layering, an updated material package for enhanced durability, updated fit, and a dope dyed liner.
What do you mean by updated material package?
We updated the materials the Atom LT is made of, you can read a list of them here:
Coreloft™ Compact (60 g/m² ) insulation. Highly crimped, multi-denier siliconized polyester yarn that has undergone a special process which reduces the thickness of the material by 50%, without reducing its insulation value by the same amount. Lightweight, breathable, thermally efficient 100% polyester fibre.
Tyono™ 20 denier shell with DWR treatment - 100% nylon
Stretch fleece - 94% polyester, 6% elastane
Dope Permeair™ 20 - 100% nylon
Last year's model did not include the Dope Permeair.
How does it affect the use of this jacket in practice?
It doesn't effect it, really - Dope Dying is much more environmentally friendly so we are reducing our mark on the planet by incorporating it into the production process.
Overall the updated Atom saw more changes with the fit, durability and construction on the cuff.
If anything it's very slightly more durable now.
Which update made it more durable?
The additional dope dyed liner.
Ok, thanks. Lastly, how did the fit change?
It is about 1" longer than the previous year's model.
So other than this hem length difference, everything stays the same in the fit department?
That's right.

Comments

Craig G says

October 19, 2019 at 4:13 am

What do you think of the updated Fall 2019 Proton LT compared to the updated Fall 2019 Patagonia Nano Air? I think this would be a great comparison!
- Canberk Koksal says
  
  October 19, 2019 at 11:58 am
  
  Craig,
  
  Most important thing to note here is that these 2 jackets are MUCH more alike than they’re not. I’d say they’re 90% the same (except the Air looks quite ugly and Proton LT looks quite gorgeous to most people).
  
  The scores in this chart might help you:
  https://outdoorcrunch.com/synthetic-insulated-jackets/
  
  As you see, Nano Air is a perfect technical piece. Proton LT, on the other hand, is also a perfect technical piece, but, compared to Air, it’s also more suitable for casual outgoings as well.
  
  If you’ll be using the jacket both in the town when it’s cold out AND during high output activities, I’d recommend Proton LT.
  
  If you’ll be using it during high output activities only, I’d recommend the Air.
  
  Hope this helps.
Neonomide says

October 27, 2019 at 8:53 pm

Great comparison! Some notes though. I think that the new Proton has a new internal liner as well, no? If Permeair is new, then basically they changed every material in the jacket! Seems a pretty big overhaul for me. I always felt that the old Proton had a too thick outer fabric, and it could pack a bit better and breathes less than Nano Air. Preferred the Proton fit all the way. Atom LT did not do it for me (those annoying side panels).

Arc’teryx developed a lighter Proton FL at the same time with Octaloft insulation and the lighter Fortius 20 outer fabric (which it now shares with new Proton LT. I’d have to check out the new LT out if I didn’t have the old one. For now, I’ll be getting the FL for layering and maximizing the breathability.

In the meanwhile, I’d love to see Proton LT old vs new comparisons!
- Rob S says
  
  September 4, 2020 at 3:59 pm
  
  Just discovered Arcteryx a couple years ago, and I’m glad I did. Nothing else provides the technical details involved it making super light but warm outdoor gear in my opinion. Just curious as to how the Atom AR was rated as providing more warmth than the Cerium Lt? I have the Cerium Lt and sweat with it indoors at room temp. I know the Atom AR has slightly more synthetic insulation,, but figured as far as strictly warmth, down is warmer overall, no? If that’s the case I’m going to seriously look into an Atom AR for the future as I do prefer synthetic over down,,, mainly because with down you can never wear anything black or dark colored without feathers attaching to your sweaters etc. Great detailed review. Thank you.
Janusz Martinsson says

May 1, 2020 at 5:31 am

Hi!

I live in Sweden and have both jackets.
You forgot to mention one important thing in difference.

The Atom LT can stand against in fairly windy conditions while the Proton LT has absolutely no wind barrier at all and you have to put on a shell. The wind blows right through the Proton.
- Canberk says
  
  May 1, 2020 at 10:05 am
  
  Thank you for sharing your thoughts and experiences Janusz 🙂
Thomas says

August 30, 2020 at 6:44 pm

Hi,

The Atom LT has been updated with the same Coreloft Compact as Proton LT this year, so with 20g less but same insulation materials, isn’t the Atom LT being less warmer but more air-permeabe in 2020?

Thanks
Ross m says

October 21, 2020 at 6:15 pm

Where does the Gamma LT Jacket fit into this?

Thanks for the great review!
- Canberk says
  
  October 23, 2020 at 12:52 pm
  
  Hi Ross,
  
  Gamma LT isn’t insulated. Check out my guide to Arc’teryx Shells if you’re interested in more information about the Gamma LT.
Giuseppe says

December 5, 2020 at 5:01 pm

Hello,

love your reviews, I would like to know your opinion about the Proton LT and the Atom AR.

Which one do you recommend to wear for a daily base stand alone jacket (I live in London, so basically deal with the UK weather)

Thanks
- Canberk says
  
  December 8, 2020 at 12:28 pm
  
  Thank you for your comment Giuseppe!
  
  Atom AR is warmth focused, and the Proton LT is breathability focused. Correct me if I’m wrong, but London must be freezing now haha. So, unless you’re planning to use this jacket for high output activities, I’d get the Atom AR. Perfect for stationary use. Plus: Synthetic insulated structure of the Atom AR doesn’t keeps warm even under damp weather (unlike down insulated jackets). An important point for London, if you ask me.
Matt says

February 7, 2021 at 5:29 am

Anyone else noticed a size difference between Proton and Atom?

I have historically always been a small in everything Arc’teryx but not as of late.

Small in Nuclei, Proton and also the Kyanite (I know it’s a fleece but nonetheless) is dreadfully tight and I have had to go up to a medium. Small still fits perfect in both 2020 Atom iterations though. Go figure…
Tze says

March 24, 2021 at 10:58 am

Hi –

It seems the Atom LT has been updated with Coreloft Compact 60gm. Have you tested this version as it would seem that this should improve the breath ability?

Thanks
olivier says

November 30, 2021 at 8:20 pm

Hey thanks for the reviews it really helps! I live in Montreal, Canada and I’m shopping layers to put underneath my Beta AR. I have a very good first layer, a couple of fleeces and obviously a Beta AR. So from what I understood, when I go resort skiing, the Atome LT and Proton LT would both be good options? I’m used to having one ski jacket and this layer system is diffirent for me. Thanks for your help!

Warmth

Weather resistance

Breathability

Packability

Layering

Atom LT 2020 Revision

Proton LT 2019 Revision

Fortius 40 vs 20

Coreloft Continuous vs Compact

Results

Conclusion

Transcript of Customer Service Chat for 2020 Atom LT Updates

Reader Interactions

Comments