Atom (aka LT) vs Cerium (aka LT): Temp ratings & more

Y'all know this is just my opinion... right?

Comparing Arc'teryx Atom vs Cerium. I own both.

I own both. Winter '24 Cerium (aka LT) on the left in Black Sapphire and Winter '24 Atom (aka LT) on the right. Both are size M. I'm 5'11, 165 lbs, athletic build.

Summary

The Arc'teryx Atom (aka LT) and Arc'teryx Cerium (aka LT) jackets are directed toward completely different uses.

The Atom is a synthetic insulated jacket. It breathes a lot through its side fleece panels. This makes it a perfect pick for high-output activities.

The Cerium, on the other hand, is a down jacket. It's noticeably warmer and much lighter. It's perfect for casual use. But it doesn't breathe at all.

One of the most important factors you should consider when it comes to Atom vs Cerium is that the Cerium doesn't resist precipitation at all. Keep in mind that the insulating power of down is completely lost once it becomes wet.

This is why I recommend the Cerium Jacket (hoodless) and the Atom Hoody. I'll explain why in a moment ...

In summary, the only scenario where the Cerium would be a better item is casual use in cold, dry areas. For any other uses I'd go with the Atom.

Cerium vs Atom on arcteryx.com: https://arcteryx.com/us/en/compare/X000007313/X000007487

Warmth

Temperature ratings of Arc'teryx jackets

Name	Est. Temp (F/C)	Review	Pit venting?	Two way zipper?	Stuffs into itself?	Type	Fill Power (in3/oz)	Fill Weight (g)	Fill Volume (in3)	Synthetic Fill	Synth. Fill Weight	Face Fabric	Activity	Fit	Weight	Length (CB)
Arc'teryx Alpha Parka (Men's - Women's)	-15 / -26	Review	No	Yes	Yes	Down	850	296	8,875	Coreloft	90 g/m²	N30r 2L GoreTex Infinium	Climbing	Regular	805 g / 1 lb 12.4 oz	86 cm / 34 in
Arc'teryx Alpha Lightweight (Men's - Women's)	5/-15		No	Yes	Yes	Down	850	117	3,508	Coreloft Compact	40 g/m²	Hadron 2L Gore-Tex Infinium	Climbing	Regular	540 g / 1 lb 3 oz	79.5 cm / 31.25 in
Arc'teryx Atom (aka 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 Atom SV (Men's - Women's)	18/-8	Review	Yes, mesh	No	No	Synthetic	N/A	N/A	N/A	Coreloft Continuous	120 g/m2	30D Tyono	All Round	Regular	455 g / 1 lb	74 cm / 29.1 in
Arc'teryx Atom SL (Lightweight) (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	270 g / 9.5 oz	72 cm / 28.3 in
Arc'teryx Beta Down Insulated (Men's - Women's)	0/-18		Yes	Yes	No	Parka	850	126	3,778	Coreloft	80 g/m²	2L 40D Gore-Tex	All Round	Regular	760 g / 1 lb 10.8 oz	79 cm / 31 in
Arc'teryx Beta Insulated (Men's)	21/-6	Review	Yes, zips	Yes	No	Parka	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
Arc'teryx Beta Insulated Coat (Women's)	16/-9	Review	No	Yes	No	Parka	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	86 cm / 34 in
Arc'teryx Cerium (aka LT) (Men's - Women's)	26/-3	Review	No	No	Yes	Down	850	113	3,388	Coreloft	80 + 100 g/m²	Arato 15	All Round	Trim	335 g / 11.8 oz	72 cm / 28.3 in
Arc'teryx Cerium Hybrid (Women's)	44/7		No	No	Yes	Down	850	44	1,319	Coreloft	40 + 100 g/m²	Arato 15 + Fortius Air 50	All Round	Trim	260 g / 9.2 oz	70 cm / 27.5 in
Arc'teryx Cerium SV (Men's / Women's)	2/-17	Review	No	Yes	No	Down	1000	130	4,586	Coreloft	140 g/m²	20D Pertex® Diamond Fuse	All Round	Regular	436g / 15.4 oz	79 cm / 31 in
Arc'teryx Coelle (Women's)	14/-10		No	Yes	No	Parka	N/A	N/A	N/A	Coreloft	98 g/m²	40D 2L Gore-Tex	Around Town	Regular	435g / 15.3 oz	70 cm / 27.5 in
Arc'teryx Liatris (Women's)	5/-15		No	No	No	Parka	850	93	2,788	Climashield	80 g/m2 + 60 g/m2	70D 3L Gore-Tex	Around Town	Regular	890 g / 1 lb 15.4 oz	75 cm / 29.5 in
Arc'teryx Liatris Parka (Women's)	2/-17		No	No	No	Parka	850	136	4,078	Climashield	80 g/m2 + 60 g/m2	70D 3L Gore-Tex	Around Town	Regular	1.093 kg / 2 lb 6.6 oz	109 cm / 43 in
Arc'teryx Nuclei (aka FL) ( Men's - Women's)	32/0	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	65 g/m²	Arato 10r	All Round	Regular	325 g / 11.5 oz	75 cm / 29.5 in
Arc'teryx Nuclei SV (Women's)	5/-15	Review	No	Yes	Yes	Synthetic	N/A	N/A	N/A	Coreloft Continuous	190 g/m2 + 90 g/m2	Arato 15	All Round	Regular	600 g / 1 lb 5.2 oz	81 cm / 31.8 in
Arc'teryx Patera (Women's)	21/-6	Review	No	Yes	No	Parka	750	67	1,773	Coreloft	60 + 80 g/m²	2L Gore-Tex	Around Town	Trim	867 g / 1 lb 14.6 oz	99 cm / 39 in
Arc'teryx Patera Long (Women's)	0/-18		No	Yes	No	Parka	750	204	5,397	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
Arc'teryx Proton SL (Lightweight) (Men's - Women's)	48/9	Review	No	No	No	Synthetic	N/A	N/A	N/A	Octa Loft	94 g/m²	Fortius Air 20	Climbing	Trim	343 g / 12.1 oz	75 cm / 29.5 in
Arc'teryx Therme Parka (Men's)	5/-15	Review	No	Yes	No	Parka	750	120	3,175	Coreloft	60 + 80 g/m²	P75d Polyester	Around Town	Regular	991 g / 2 lb 3 oz	85 cm / 33.5 in
Arc'teryx Therme SV (Men's)	-11/-24	Review	No	Yes	No	Parka	750	211	5,582	Coreloft	60 g/m²	2L Gore-Tex	Around Town	Regular	1.072 kg / 2 lb 5.8 oz	96 cm / 37.75 in
Arc'teryx Thorium ( Men's - Women's)	12/-11	Review	No	Yes	Yes	Down	750	140	3,704	Coreloft	80 + 140 g/m²	Arato 30	All Round	Regular	517 g / 1 lb 2.2 oz	71.5 cm / 28.1 in
Arc'teryx Thorium Parka (Women's)	-2/-19	Review	No	Yes	No	Down	750	209	5,529	Coreloft	80 + 140 g/m²	Arato 20	Around Town	Regular	610 g / 1 lb 5.5 oz	115.8 cm / 45.6 in
Arc'teryx Thorium SV (Men's)	3/-16		No	Yes	Yes	Down	750	169	4,471	Coreloft	80 + 140 g/m²	Arato 30 & 2L Gore-Tex Infinium	Around Town	Regular	645 g / 1 lb 6.8 oz	73 cm / 28.75 in
Arc'teryx Thorium SV Parka (Men's)	0/-18		No	Yes	No	Down	750	195	5,159	Coreloft	80 + 140 g/m²	Arato 30 & 2L Gore-Tex Infinium	Around Town	Regular	685 g / 1 lb 8.2 oz	85 cm / 33.5 in
Black Diamond Access Down (Men's - Women's)	25/-4		No	No	Yes	Down	800	112	3,161	N/A	N/A	20D ripstop nylon	All Round	Regular	323 g / 11.4 oz	76 cm / 29.75 in
Black Diamond Deploy Hoody (Men's - Women's)	27/-3		No	No	Yes	Down	800	110	3,104	N/A	N/A	10D ripstop nylon	All Round	Regular	304 g / 10.7 oz
Black Diamond Mission Down Parka (Men's - Women's)	-5/-20		No	Yes	No	Down	800	252	7,111	N/A	N/A	Nylon with Liquid Crystal Polymer Ripstop	All Round	Regular	616 g / 21.7 oz	78 cm / 30.75 in
Feathered Friends Eos(Men's - Women's)	8/-13		No	No	Yes	Down	900	105	3,333	N/A	N/A	Pertex Quantum	All Round	Regular	306 g / 10.8 oz	?
Feathered Friends Khumbu (Men's)	-17/-27		No	No	Yes	Down	900	378	12,000	Primaloft Gold	200 g/m²	Pretex Shield XT	All Round	Regular	960 g / 2 lb 2 oz	?
Feathered Friends Ellia (Women's)	23/-5		No	No	No	Down	900	138	4,381	N/A	N/A	Pertex® Endurance® LT	All Round	Regular	368 g / 13 oz
Feathered Friends Helios (Unisex)	18/-8		No	Yes	Yes	Down	900	185	5,873	N/A	N/A	20D Pertex® Quantum Pro®	All Round	Regular	426 g / 15 oz
Feathered Friends Volant (Unisex)	-13/-25		No	Yes	No	Down	900	311	9,873	N/A	N/A	20d recycled Pertex® Shield	All Round	Regular	732 g / 1 lb 9.8 oz
Patagonia AlpLoft (Men's)	-10/-23		No	Yes	Yes	Down	800	295	8,325	N/A	N/A	Pertex® Quantum	All Round	Regular	680 g / 1 lb 8 oz	81 cm / 31.8 in
Patagonia DAS (Men's - Women's)	10/-12	Review	No	Yes	Yes	Synthetic	N/A	N/A	N/A	PrimaLoft Gold Insulation Eco	133 + 40 g/m²	Pertex® Quantum Pro	All Round	Regular	555 g / 1 lb 3.6 oz	84 cm / 33 in
Patagonia DAS Light(Men's)	34/1	Review	No	Yes	Yes	Synthetic	N/A	N/A	N/A	PlumaFill	65 g	10D Pertex Quantum Pro	All Round	Regular	320 g / 11.3 oz	77 cm / 30.5 in
Patagonia Down Sweater (Men's - Women's)	23/-5	Review	No	No	Yes	Down	800	150	4,233	N/A	N/A	1.4 oz 20x30D polyester	All Round	Regular	428 g / 15.1 oz	67 cm / 26.25 in
Patagonia Downdrift (Men's - Women's)	18/-8		No	No	No	Down	600	279	5,905	N/A	N/A	4.2 oz polyester	Around Town	Regular	1.014 kg / 2 lb 3.8 oz	?
Patagonia Fitz Roy (Men's - Women's)	14/-10		No	No	Yes	Down	800	128	3,612	N/A	N/A	20D Nylon	All Round	Regular	632 g / 1 lb 6.3 oz	74 cm / 29 in
Patagonia Grade VII (Unisex)	-17/-27		No	Yes		Down	900	372	11,810	N/A	N/A	0.8 oz 10-denier Pertex® Quantum Pro	All Round	Regular	712 g / 1 lb 9oz	87.5cm / 34.4 in
Men's Hi-Loft Nano Puff® Hoody Men's - Women's	23/-5	Review	No	Yes	No	Synthetic	N/A	N/A	N/A	PrimaLoft® Silver	200 + 170 g/m²	1.4 oz 20D 100% recycled polyester	All Round	Regular	760 g / 1 lb 10.8 oz)
Patagonia Isthmus (Men's)	36/2		No	No	No	Parka	N/A	N/A	N/A	ThermoGreen	60 g/m²	4.2 oz polyester	Around Town	Regular	895 g / 1 lb 15.6 oz	70 cm / 27.5 in
Patagonia Jackson Glacier (Men's - Women's)	12/-11	Review	No	Yes	No	Down	700	141	3,482	N/A	N/A	3.6 oz 50D polyester	Around Town	Regular	880 g / 1 lb 15 oz	79 cm / 31 in
Patagonia Jackson Glacier Parks ( Women's)	7/-14		No	No	No	Parka	700	218	5,383	N/A	N/A	50D Polyester	Around Town	Regular	1.142 kg / 2 lb 8.3 oz	?
Patagonia Micro Puff (Men's - Women's)	32/0	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	PlumaFill	65 g/m²	Pertex Quantum	All Round	Regular	298 g / 10.5 oz	75 cm / 29.5 in
Patagonia Nano Air (Men's - Women's)	35/2	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	FullRange	60 g/m²	33D nylon ripstop	All Round	Trim	401 g / 14.14 oz	?
Patagonia Nano Air Light Hybrid (Men's - Women's)	40/5		No	No	No	Synthetic	N/A	N/A	N/A	FullRange	40 g/m²	20D nylon ripstop	All Round	Trim	335 g / 11.8 oz	?
Patagonia Nano Air Light Ultralight (Men's - Women's)	45/7	Review	No	No		Synthetic	N/A	N/A	N/A	FullRange	20 g/m²	1.6-oz 30D shadow stretch polyester	High Output	Trim	249 g / 8.8 oz
Patagonia Nano Puff (Men's - Women's)	35/2	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	PrimaLoft Gold Insulation Eco	60 g/m²	22D Polyester	All Round	Regular	363 g / 12.8 oz	71.5 cm / 28 in
Patagonia Silent Down (Men's - Women's)	26/-3	Review	No	No	No	Down	700	109	2,691	N/A	N/A	2.2 oz polyester	Around Town	Regular	585 g / 1 lb 4.7 oz	74 cm / 29 in
Patagonia Stormshadow (Men's)	0/-18		No	No	No	Parka	700	259	6,395	N/A	N/A	75D Polyester	Around Town	Regular	1.182 kg / 2 lb 9.7 oz	?
Patagonia Stormshift Insulated (Men's - Women's)	25/-4		Yes	No	No	Synthetic	N/A	N/A	N/A	ThermoGreen	100 + 60 g/m²	2L GORE-TEX ePE	Snowsports	Regular	940 g / 2 lb 1 oz
Patagonia Tres 3-in-1(Men's - Women's)	8/-13	Review	No	No	No	Parka	700	118	2,914	N/A	N/A	5.5 oz polyester	Around Town	Regular	1.307 kg / 2 lb 14.1 oz	85 cm / 33.5 in
Rab Electron Pro (Men's - Women's)	5/-15		No	Yes	Yes	Down	800	180	5,079	N/A	N/A	20D Pertex Quantum Pro	All Round	Regular	525 g / 1 lb 2.5 oz	74 cm / 29 in
Rab Infinity Windstopper Down (Men's)	1/-17		No	Yes	Yes	Down	800	194	5,475	N/A	N/A	30D GORE-TEX Windstopper	All Round	Regular	657 g / l lb 7 oz	77 cm / 30.3 in
Rab Microlight Alpine (Men's - Women's)	23/-5		No	No	Yes	Down	700	153	3,778	N/A	N/A	30D Pertex Quantum	All Round	Regular	466 g / 1 lb 0.5 oz	72 cm / 28.5 in
Rab Mythic G (Men's - Women's)	15/-9		No	No	No	Down	1000	127	4,480	N/A	N/A	7D Atmos™ nylon w/ reflective lining.	All Round	Regular	277 g / 9.8 oz	72 cm / 28.5 in
Rab Mythic Ultra (Men's)	-5/-20		No	Yes	No	Down	900	240	7,619	N/A	N/A	10D Recycled Pertex® Quantum	Climbing	Regular	537 g / 1 lb 3 oz	76.5 cm / 30.1 in
Rab Neutrino Pro (Men's - Women's)	-2/-19		No	Yes	Yes	Down	800	212	5,982	N/A	N/A	20D Pertex Quantum Pro	All Round	Regular	585 g / 1 lb 8.6 oz	77 cm / 30.3 in
REI Co-op 650 (Men's - Women's)	30/-1		No	No	No	Down	650	99	2,270	N/A	N/A	Recycled ripstop nylon	All Round	Regular	312 g / 11 oz	72 cm / 28.5 in
REI Magma 850 (Men's - Women's)	26/-3		No	No	Yes	Down	850	111	3,328	N/A	N/A	Recycled ripstop nylon	All Round	Regular	312 g / 11 oz	74 cm / 29.25 in
Stio Hometown Down (Men's - Women's)	12/-11	Review	No	No	No	Down	800	198	5,587	N/A	N/A	20D HTD™ 100% Recycled Nylon	All Round	Regular	581 g / 1 lb 4.5 oz
Stio Pinion Hooded (Men's - Women's)	26/-3		No	No		Down	800	125	3,527	N/A	N/A	20D Pertex® Quantum®	All Round	Regular	312 g / 11 oz	70 cm / 27.5 in
Stio Shot 7 Insulated Shell (Men's - Women's)	15/-9		Yes	Yes	No	Down	800	105	2,963	N/A	N/A	75D GORE-TEX® 2L 170g ePE	Snowsports	Regular	1.049kg / 2 lb 5 oz	77 cm / 30.5 in
Stio Colter (Men's - Women's)	15/-9		Yes	No	No	Down	650	206	4,723	N/A	N/A	50D GORE-TEX WINDSTOPPER® 2L	All Round	Regular	850 g / 1 lb 14 oz	72 cm / 28.5 in

Assumptions: Worn over a thin shirt, no output, no precipitation, light to no wind. Values are always for size M and for men's, except for women's-only items.

Primary use of this spectrum is for comparison, rather than figuring out absolute temp ratings.

Working principles of insulated jackets: https://outdoorcrunch.com/jackets/
CLO Values: https://outdoorcrunch.com/clo-values/
Best Arc'teryx jackets: https://outdoorcrunch.com/best-arcteryx-jacket/
Best sellers (new pages)
- https://arcteryx.com/us/en/c/mens/p/best-sellers
- https://arcteryx.com/us/en/c/womens/p/best-sellers

Performance ratings of Arc'teryx synthetics

Name	Est. Temp (F/C)	Breathability	Wind Res.	Abrasion res.	Packability	Review	Stuffs into itself?	Face Fabric	Activity	Fit	Weight	Discontinued?
Arc'teryx Alpha Parka (Men's - Women's)	-15 / -26	No data	No data	No data	No data	Review	Yes	N30r 2L GoreTex Infinium	Climbing	Regular	805 g / 1 lb 12.4 oz	No
Arc'teryx Alpha Lightweight (Men's - Women's)	5/-15	No data	No data	No data	No data		Yes	Hadron 2L Gore-Tex Infinium	Climbing	Regular	540 g / 1 lb 3 oz	No
Arc'teryx Atom (aka LT) ( Men's - Women's)	43/6	9/10	6/10	7/10	5/10	Review	No	20D Tyono	All Round	Trim	375 g / 13.2 oz	No
Arc'teryx Atom SV (Men's - Women's)	18/-8	5/10	8/10	8/10	3/10	Review	No	30D Tyono	All Round	Regular	455 g / 1 lb	No
Arc'teryx Atom SL (Lightweight) (Men's - Women's)	52/11	10/10	2/10	7/10	6/10	Review	No	20D Tyono	All Round	Trim	270 g / 9.5 oz	No
Arc'teryx Beta Down Insulated (Men's - Women's)	0/-18	No data	No data	No data	No data		No	2L 40D Gore-Tex	All Round	Regular	760 g / 1 lb 10.8 oz	No
Arc'teryx Beta Insulated (Men's)	21/-6	No data	No data	No data	No data	Review	No	2L 40D Gore-Tex	All Round	Regular	680 g / 1 lb 8 oz	No
Arc'teryx Beta Insulated Coat (Women's)	16/-9	No data	No data	No data	Testing	Review	No	2L 40D Gore-Tex	Around Town	Regular	600 g / 1 lb 5.2 oz	No
Arc'teryx Cerium (aka LT) (Men's - Women's)	26/-3	No data	No data	No data	No data	Review	Yes	Arato 15	All Round	Trim	335 g / 11.8 oz	No
Arc'teryx Cerium Hybrid (Women's)	44/7	No data	No data	No data	No data		Yes	Arato 15 + Fortius Air 50	All Round	Trim	260 g / 9.2 oz	No
Arc'teryx Cerium SV (Men's / Women's)	2/-17	No data	4/10	7/10	No data	Review	No	20D Pertex® Diamond Fuse	All Round	Regular	436g / 15.4 oz	no
Arc'teryx Coelle (Women's)	14/-10	No data	No data	No data	No data		No	40D 2L Gore-Tex	Around Town	Regular	435g / 15.3 oz	No
Arc'teryx Liatris (Women's)	5/-15	No data	No data	No data	No data		No	70D 3L Gore-Tex	Around Town	Regular	890 g / 1 lb 15.4 oz	No
Arc'teryx Liatris Parka (Women's)	2/-17	No data	No data	No data	No data		No	70D 3L Gore-Tex	Around Town	Regular	1.093 kg / 2 lb 6.6 oz	No
Arc'teryx Nuclei (aka FL) ( Men's - Women's)	32/0	2/10	9/10	2/10	10/10	Review	Yes	Arato 10r	All Round	Regular	325 g / 11.5 oz	No
Arc'teryx Nuclei SV (Women's)	5/-15	1/10	10/10	2/10	8/10	Review	Yes	Arato 15	All Round	Regular	600 g / 1 lb 5.2 oz	No
Arc'teryx Patera (Women's)	21/-6	No data	No data	No data	No data	Review	No	2L Gore-Tex	Around Town	Trim	867 g / 1 lb 14.6 oz	No
Arc'teryx Patera Long (Women's)	0/-18	No data	No data	No data	No data		No	2L Gore-Tex	Around Town	Regular	1.1 kg / 2 lb 6.8 oz	No
Arc'teryx Proton SL (Lightweight) (Men's - Women's)	48/9	8/10	4/10	7/10	6/10	Review	No	Fortius Air 20	Climbing	Trim	343 g / 12.1 oz	No
Arc'teryx Therme Parka (Men's)	5/-15	No data	No data	No data	No data	Review	No	P75d Polyester	Around Town	Regular	991 g / 2 lb 3 oz	No
Arc'teryx Therme SV (Men's)	-11/-24	No data	No data	No data	No data	Review	No	2L Gore-Tex	Around Town	Regular	1.072 kg / 2 lb 5.8 oz	No
Arc'teryx Thorium ( Men's - Women's)	12/-11	No data	No data	No data	No data	Review	Yes	Arato 30	All Round	Regular	517 g / 1 lb 2.2 oz	No
Arc'teryx Thorium Parka (Women's)	-2/-19	No data	No data	No data	No data	Review	No	Arato 20	Around Town	Regular	610 g / 1 lb 5.5 oz	No
Arc'teryx Thorium SV (Men's)	3/-16	No data	No data	No data	No data		Yes	Arato 30 & 2L Gore-Tex Infinium	Around Town	Regular	645 g / 1 lb 6.8 oz	No
Arc'teryx Thorium SV Parka (Men's)	0/-18	No data	No data	No data	No data		No	Arato 30 & 2L Gore-Tex Infinium	Around Town	Regular	685 g / 1 lb 8.2 oz	No
Black Diamond Access Down (Men's - Women's)	25/-4	No data	6/10	No data	No data		Yes	20D ripstop nylon	All Round	Regular	323 g / 11.4 oz	No
Black Diamond Deploy Hoody (Men's - Women's)	27/-3	No data	6/10	No data	8/10		Yes	10D ripstop nylon	All Round	Regular	304 g / 10.7 oz
Black Diamond Mission Down Parka (Men's - Women's)	-5/-20	No data	No data	No data	No data		No	Nylon with Liquid Crystal Polymer Ripstop	All Round	Regular	616 g / 21.7 oz
Feathered Friends Eos(Men's - Women's)	8/-13	No data	No data	No data	No data		Yes	Pertex Quantum	All Round	Regular	306 g / 10.8 oz	No
Feathered Friends Khumbu (Men's)	-17/-27	No data	No data	No data	No data		Yes	Pretex Shield XT	All Round	Regular	960 g / 2 lb 2 oz	No
Feathered Friends Ellia (Women's)	23/-5	No data	No data	No data	No data		No	Pertex® Endurance® LT	All Round	Regular	368 g / 13 oz
Feathered Friends Helios (Unisex)	18/-8	No data	No data	No data	No data		Yes	20D Pertex® Quantum Pro®	All Round	Regular	426 g / 15 oz
Feathered Friends Volant (Unisex)	-13/-25	No data	No data	No data	No data		No	20d recycled Pertex® Shield	All Round	Regular	732 g / 1 lb 9.8 oz
Patagonia AlpLoft (Men's)	-10/-23	No data	No data	No data	No data		Yes	Pertex® Quantum	All Round	Regular	680 g / 1 lb 8 oz	No
Patagonia DAS (Men's - Women's)	10/-12	1/10	9/10	3/10	6/10	Review	Yes	Pertex® Quantum Pro	All Round	Regular	555 g / 1 lb 3.6 oz	No
Patagonia DAS Light(Men's)	34/1	2/10	8/10	2/10	9/10	Review	Yes	10D Pertex Quantum Pro	All Round	Regular	320 g / 11.3 oz	No
Patagonia Down Sweater (Men's - Women's)	23/-5	No data	4/10	6/10	7/10	Review	Yes	1.4 oz 20x30D polyester	All Round	Regular	428 g / 15.1 oz	No
Patagonia Downdrift (Men's - Women's)	18/-8	No data	No data	No data	No data		No	4.2 oz polyester	Around Town	Regular	1.014 kg / 2 lb 3.8 oz	No
Patagonia Fitz Roy (Men's - Women's)	14/-10	No data	No data	No data	No data		Yes	20D Nylon	All Round	Regular	632 g / 1 lb 6.3 oz	No
Patagonia Grade VII (Unisex)	-17/-27	4/10	5/10	4/10	6/10			0.8 oz 10-denier Pertex® Quantum Pro	All Round	Regular	712 g / 1 lb 9oz
Men's Hi-Loft Nano Puff® Hoody Men's - Women's	23/-5	4/10	6/10	7/10	3/10	Review	No	1.4 oz 20D 100% recycled polyester	All Round	Regular	760 g / 1 lb 10.8 oz)
Patagonia Isthmus (Men's)	36/2	No data	No data	No data	No data		No	4.2 oz polyester	Around Town	Regular	895 g / 1 lb 15.6 oz	No
Patagonia Jackson Glacier (Men's - Women's)	12/-11	No data	No data	No data	No data	Review	No	3.6 oz 50D polyester	Around Town	Regular	880 g / 1 lb 15 oz	No
Patagonia Jackson Glacier Parks ( Women's)	7/-14	No data	No data	No data	No data		No	50D Polyester	Around Town	Regular	1.142 kg / 2 lb 8.3 oz	No
Patagonia Micro Puff (Men's - Women's)	32/0	5/10	6/10	5/10	8/10	Review	Yes	Pertex Quantum	All Round	Regular	298 g / 10.5 oz	No
Patagonia Nano Air (Men's - Women's)	35/2	7/10	5/10	5/10	8/10	Review	Yes	33D nylon ripstop	All Round	Trim	401 g / 14.14 oz	No
Patagonia Nano Air Light Hybrid (Men's - Women's)	40/5	No data	No data	No data	No data		No	20D nylon ripstop	All Round	Trim	335 g / 11.8 oz	No
Patagonia Nano Air Light Ultralight (Men's - Women's)	45/7	9/10	5/10	No data	No data	Review		1.6-oz 30D shadow stretch polyester	High Output	Trim	249 g / 8.8 oz
Patagonia Nano Puff (Men's - Women's)	35/2	4/10	6/10	6/10	8/10	Review	Yes	22D Polyester	All Round	Regular	363 g / 12.8 oz	No
Patagonia Silent Down (Men's - Women's)	26/-3	No data	No data	No data	No data	Review	No	2.2 oz polyester	Around Town	Regular	585 g / 1 lb 4.7 oz	No
Patagonia Stormshadow (Men's)	0/-18	No data	No data	No data	No data		No	75D Polyester	Around Town	Regular	1.182 kg / 2 lb 9.7 oz	No
Patagonia Stormshift Insulated (Men's - Women's)	25/-4	No data	8/10	No data	No data		No	2L GORE-TEX ePE	Snowsports	Regular	940 g / 2 lb 1 oz
Patagonia Tres 3-in-1(Men's - Women's)	8/-13	No data	No data	No data	No data	Review	No	5.5 oz polyester	Around Town	Regular	1.307 kg / 2 lb 14.1 oz	No
Rab Electron Pro (Men's - Women's)	5/-15	No data	No data	No data	No data		Yes	20D Pertex Quantum Pro	All Round	Regular	525 g / 1 lb 2.5 oz	No
Rab Infinity Windstopper Down (Men's)	1/-17	No data	7/10	No data	No data		Yes	30D GORE-TEX Windstopper	All Round	Regular	657 g / l lb 7 oz
Rab Microlight Alpine (Men's - Women's)	23/-5	No data	No data	No data	No data		Yes	30D Pertex Quantum	All Round	Regular	466 g / 1 lb 0.5 oz	No
Rab Mythic G (Men's - Women's)	15/-9	No data	No data	No data	8/10		No	7D Atmos™ nylon w/ reflective lining.	All Round	Regular	277 g / 9.8 oz
Rab Mythic Ultra (Men's)	-5/-20	No data	No data	No data	No data		No	10D Recycled Pertex® Quantum	Climbing	Regular	537 g / 1 lb 3 oz
Rab Neutrino Pro (Men's - Women's)	-2/-19	No data	No data	No data	No data		Yes	20D Pertex Quantum Pro	All Round	Regular	585 g / 1 lb 8.6 oz	No
REI Co-op 650 (Men's - Women's)	30/-1	No data	No data	No data	No data		No	Recycled ripstop nylon	All Round	Regular	312 g / 11 oz
REI Magma 850 (Men's - Women's)	26/-3	No data	No data	No data	No data		Yes	Recycled ripstop nylon	All Round	Regular	312 g / 11 oz	No
Stio Hometown Down (Men's - Women's)	12/-11	No data	No data	No data	No data	Review	No	20D HTD™ 100% Recycled Nylon	All Round	Regular	581 g / 1 lb 4.5 oz
Stio Pinion Hooded (Men's - Women's)	26/-3	No data	No data	No data	No data			20D Pertex® Quantum®	All Round	Regular	312 g / 11 oz
Stio Shot 7 Insulated Shell (Men's - Women's)	15/-9	6/10	8/10	No data	No data		No	75D GORE-TEX® 2L 170g ePE	Snowsports	Regular	1.049kg / 2 lb 5 oz
Stio Colter (Men's - Women's)	15/-9	5/10	No data	No data	No data		No	50D GORE-TEX WINDSTOPPER® 2L	All Round	Regular	850 g / 1 lb 14 oz

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

Best synthetic insulated jackets: https://outdoorcrunch.com/synthetic-insulated-jackets/

Performance ratings of Arc'teryx shells

Name	Activity	Temp (F/C)	Breathability	Weather Res.	Durability	Packability	Bottom line	Review	Pit zips?	Two way zipper?	Stuffs into itself?	Face Fabric	Fit	Weight	Length	Discontinued?
Alpha (aka AR) (Men's - Women's)	Climbing	N/A	8/10	9/10	8/10	4/10	Go-to climbing harshell.	Review	Yes	No	No	N40d & N80d Most Rugged 3L Gore-Tex Pro	Regular	430 g / 15.2 oz	79.5 cm / 31.25 in	No
Alpha SV (Men's - Women's)	Climbing	N/A	8/10	10/10	10/10	3/10	Strongest climbing hardshell.	Review	Yes	No	No	N100d Most Rugged 3L Gore-Tex Pro	Regular	510 g / 1 lb 2 oz	78 cm / 30.75 in	No
Beta (Men's - Women's)	All Round	N/A	6/10	7/10	7/10	8/10	Streamlined all-doer shell.	Review	No	No	No	N30p-X 3L Gore-Tex	Trim	300 g / 10.6 oz	76 cm / 30 in	No
Beta AR (Men's - Women's)	All Round	N/A	8/10	9/10	9/10	4/10	Go-to all-round harshell.	Review	Yes	No	No	N40d & N80d Most Rugged 3L Gore-Tex Pro	Regular	460 g / 1 lb	76 cm / 30 in	No
Beta AR StormHood (Men's - Women's)	All Round	N/A	8/10	9/10	9/10	4/10		Review	Yes	No	No	N40d & N80d Most Rugged 3L Gore-Tex Pro	Regular	460 g / 1 lb	76 cm / 30 in	No
Beta Coat (Women's)	All Round	N/A	6/10	5/10	No data	5/10			No	Yes	No	3L Gore-Tex	Regular	320 g / 11.3 oz	88 cm / 34.5 in	No
Beta Down Insulated (Men's)	All Round	0/-18	9/10	7/10	8/10	No data			Yes	Yes	No	2L 40D Gore-Tex	Regular	760 g / 1 lb 10.8 oz	79 cm / 31 in	No
Beta Insulated (Men's - Women's)	All Round	21/-6	9/10	7/10	8/10	No data	Go-to hybrid jacket.	Review	Yes	Yes	No	N40d 2L Gore-Tex	Regular	680 g / 1 lb 8 oz	78.5 cm / 31 in	No
Beta Insulated Coat (Women's)	All Round	16/-9	7/10	No data	No data	No data			No	Yes	No	N40d 2L Gore-Tex	Regular	600 g / 1 lb 5.2 oz	86 cm / 34 in	No
Beta Lightweight (Men's - Women's)	All Round	N/A	8/10	7/10	7/10	6/10		Review	Yes	No	No	N40p 3L Gore-Tex	Fitted	380 g / 13.4 oz	75 cm / 29.5 in	No
Beta LT (Men's - Women's)	All Round	N/A	7/10	7/10	8/10	6/10		Review	Yes	No	No	N40d 3L Gore-Tex	Fitted	395 g / 13.9 oz	76 cm / 30 in	No
Gamma (aka LT) (Men's - Women's)	All Round	N/A	7/10	3/10	7/10	3/10	Go-to softshell.	Review	No	No	No	Wee Burly Double Weave	Regular	545 g / 1 lb 3.2 oz	76 cm / 30 in	No
Gamma MX (Men's)	All Round	N/A	6/10	4/10	8/10	3/10	Strongest softshell.	Review	No	No	No	Fortius 2.0	Regular	555 g / 1 lb 3.6 oz	74 cm / 29.1 in	No
Norvan Shell (Men's)	Running	N/A	No data	No data	No data	No data			No	No	No	13D 3L Gore-Tex	Trim	190 g / 6.7 oz	73 cm / 28.75 in	No
Rush (Women's)	Skiing	N/A	8/10	9/10	9/10	3/10	Go-to ski jacket.	Review	Yes	No	No	N80p-X & N100p-X 3L Most Rugged Gore-Tex Pro	Regular	590 g / 1 lb 4.8 oz	79.5 cm / 31.25 in	No
Rush Insulated (Women's)	Skiing	16/-9	3/10	5/10	5/10	9/10		Review	No	No	Yes	Hadron 2L Gore-Tex Infinium	Regular	515 g / 1 lb 2.2 oz	79 cm / 31 in	Yes
Sabre (Men's)	Skiing	N/A	8/10	8/10	7/10	2/10		Review	Yes	No	No	N80p-X 3L Gore-Tex	Regular	705 g / 1 lb 8.9 oz	79 cm / 31 in	No
Sentinel (Women's)	Skiing	N/A	8/10	7/10	7/10	2/10	Go-to ski jacket.	Review	Yes	No	No	N70p 3L Gore-Tex	Regular	640 g / 1 lb 6.6 oz	73.7 cm / 29 in	No
Sentinel Insulated (Women's)	Skiing	21/-6	8/10	No data	No data	No data		Review	Yes	No	No	N80p 2L Gore-Tex	Regular	600 g / 1 lb 5.2 oz	79.8 cm / 31.5 in	No
Sentinel Relaxed (Women's)	Skiing	N/A	No data	No data	No data	No data			Yes	No	No	N80p 3L Gore-Tex	Regular	655 g / 1 lb 7.1 oz	?	No
Sidewinder (Women's)	Skiing	N/A	8/10	8/10	7/10	2/10			Yes	No	No	N80p 3L Gore-Tex	Regular	570 g / 1 lb 4.1 oz	?	No
Solano (Men's - Women's)	Around Town	N/A	No data	No data	No data	No data		Review	No	No	No	Gore-Tex Infinium	Relaxed	355 g / 12.5 oz	72 cm / 28.3 in	No
Squamish (Men's - Women's)	Running	N/A	5/10	4/10	7/10	9/10	Go-to running jacket.	Review	No	No	Yes	30D Tyono	Trim	140 g / 4.9 oz	77.5 cm / 30.5 in	No
Theriss Down (Women's)	Skiing	No data	7/10	6/10	7/10	2/10		Review	Yes	No	No	N80p 2L Gore-Tex	Regular	709 g / 1 lb 9 oz	63 cm / 24.8 in	No
Alpha FL (Men's - Women's)	Climbing	N/A	7/10	No data	No data	10/10			No	No	Yes	Hadron 3L Gore-Tex	Trim	209 g / 7.4 oz	76.5 cm / 30 in	Yes
Alpha IS (Men's)	Climbing	23/-5	7/10	5/10	No data	8/10			No	Yes	Yes	N40p-X 2L Gore-Tex	Regular	610 g / 1 lb 5.5 oz	78 cm / 30.75 in	Yes
Alpha SL (Men's - Women's)	Climbing	N/A	5/10	7/10	No data	9/10			No	No	Yes	N40p 3L Gore-Tex	Trim	326 g / 11.5 oz	77.5 cm / 30.5 in	Yes
Beta SV (Men's - Women's)	All Round	N/A	8/10	10/10	10/10	3/10	Strongest all-round harshell.	Review	Yes	No	No	N80p-X Most Rugged 3L Gore-Tex Pro	Regular	495 g / 1 lb 1.5 oz	79 cm / 31 in	Yes
Gamma SL (aka lightweight) (Men's - Women's)	All Round	N/A	7/10	2/10	6/10	5/10		Review	No	No	No	Fortius 1.0	Trim	310 g / 10.9 oz	74 cm / 29.1 in	Yes
Incendia (Women's)	Skiing	N/A	8/10	9/10	9/10	3/10		Review	Yes	No	No	NP100d 3L Gore-Tex	Trim	610 g / 1 lb 5.5 oz	79 cm / 31 in	Yes
Incendo (Men's)	Running	N/A	7/10	4/10	5/10	10/10		Review	No	No	Yes	Lumin	Trim	125 g / 4.4 oz	?	Yes
Incendo Airshell (Men's	Running	N/A	No data	No data	No data	No data			No	No	Yes	?	Trim	105 g / 3.7 oz	?	Yes
Incendo SL (Men's)	Running	N/A	7/10	4/10	4/10	10/10		Review	No	No	Yes	Permair 20 & Canim	Trim	80 g / 2.8 oz	73 cm / 28.75 in	Yes
Macai (Men's)	Skiing	5/-15	7/10	7/10	6/10	1/10		Review	Yes	No	No	N40p-X 3L Gore-Tex	Regular	990 g / 2 lb 2.9 oz	75 cm / 29.5 in	Yes
Macai Lightweight (aka LT) (Men's)	Skiing	8/-13	7/10	7/10	6/10	2/10		Review	Yes	No	No	N40p-X 3L Gore-Tex	Regular	855 g / 1 lb 14.2 oz	?	Yes
Macai Shell (Men's)	Skiing	N/A	No data	No data	No data	No data		Review	Yes	No	No	N80p-X 3L Gore-Tex	Regular	775 g / 1 lb 11.3 oz	?	Yes
Micon (Men's)	Skiing	N/A	No data	No data	No data	No data			Yes	No	No	N80p 3L Gore-Tex	Regular	685 g / 1 lb 8.2 oz	83 cm / 32.5 in	Yes
Micon Heather	Skiing	N/A	No data	No data	No data	No data			Yes	No	No	NP100-d 3L Gore-Tex	Regular	685 g / 1 lb 8.2 oz	83 cm / 32.5 in	Yes
Nodin (Men's - Women's)	Running	N/A	8/10	5/10	5/10	10/10			No	No	Yes	20D Tyono	Trim	130 g / 4.6 oz	75 cm / 29.5 in	Yes
Norvan LT (Men's - Women's)	Running	N/A	5/10	5/10	8/10	6/10			No	No	No	N13p 3L Gore-Tex	Trim	190 g / 6.7 oz	?	Yes
Norvan SL (Men's - Women's)	Running	N/A	7/10	6/10	8/10	8/10		Review	No	No	Yes	Gore-Tex Infinium	Trim	120 g / 4.2 oz	77 cm / 30.4 in	Yes
Norvan SL Ins. (Women's)	Running	39/4	No data	No data	No data	No data			No	No	Yes	Gore-Tex ShakeDry	Trim	270 g / 9.5 oz	71.5 cm / 28.1 in	Yes
Norvan Windshell (Men's	Running	N/A	No data	No data	No data	No data			No	No	Yes	Permeair 20	Trim	90 g / 3.2 oz	73 cm / 28.75 in	Yes
Procline (Men's)	Skiing	N/A	No data	No data	No data	No data			Yes	No	No	N70p Gore-Tex Infinium	Trim	720 g / 1 lb 9.4 oz	76 cm / 30 in	Yes
Ravenna (Women's)	Skiing	N/A	8/10	7/10	8/10	3/10		Review	Yes	No	No	N70s-4 3L Gore-Tex	Trim	725 g / 1 lb 9.6 oz	69.5 cm / 27.4 in	Yes
Ravenna LT (Women's)	Skiing	N/A	6/10	6/10	6/10	5/10		Review	Yes	No	No	N70p 3L Gore-Tex	Trim	540 g / 1 lb 3 oz	69 cm / 27.2 in	Yes
Sabre AR (Men's)	Skiing	N/A	7/10	8/10	7/10	7/10		Review	Yes	No	No	N70p 3L Gore-Tex	Regular	700 g / 1 lb 8.7 oz	79 cm / 31 in	Yes
Sabre Insulated (See related products)	Skiing	No data	7/10	No data	6/10	No data		Review	Yes	No	No	N80p 2L Gore-Tex	Regular	815 g / 1 lb 12.7 oz	76 cm / 30 in	Yes
Sabre LT (Men's)	Skiing	N/A	7/10	8/10	7/10	8/10		Review	Yes	No	No	N80p 3L Gore-Tex	Regular	660 g / 1 lb 7.3 oz	83 cm / 32.5 in	Yes
Sabre SV (Men's)	Skiing	N/A	10/10	10/10	10/10	1/10	Strongest ski jacket.	Review	Yes	Yes	No	N100d Most Rugged 3L Gore-Tex Pro	Regular	595 g / 1 lb 5 oz	85 cm / 33.5 in	No
Sentinel AR (Women's)	Skiing	N/A	7/10	8/10	7/10	7/10		Review	Yes	No	No	N70p 3L Gore-Tex	Regular	590 g / 1 lb 4.8 oz	72.5 cm / 28.5 in	Yes
Sentinel LT (Women's)	Skiing	N/A	7/10	8/10	7/10	8/10		Review	Yes	No	No	N80p 3L Gore-Tex	Regular	565 g / 1 lb 3.9 oz	73.5 cm / 29 in	Yes
Shashka Stretch (Women's)	Skiing	N/A	No data	No data	No data	No data			Yes	No	No	N70p Gore-Tex Infinium	Trim	670 g / 1 lb 7.6 oz	71 cm / 28 in	Yes
Trino SL (Men's)	Running	N/A	8/10	5/10	7/10	6/10		Review	No	No	No	Gore-Tex Infinium	Trim	340 g / 12 oz	74 cm / 29.1 in	Yes
Trino SL Anorak (Women's)	Running	N/A	8/10	7/10	8/10	7/10		Review	No	No	No	Gore-Tex Infinium	Trim	290 g / 10.2 oz	65 cm / 25.5 in	Yes
Venda Anorak (Women's)	Around Town	N/A	No data	No data	No data	No data			No	No	No	Gore-Tex	Relaxed	255 g / 9 oz	75.5 cm / 29.7 in	Yes
Zeta AR (Men's)	Hiking	N/A	7/10	8/10	7/10	4/10			Yes	No	No	3L Gore-Tex	Regular	425 g / 15 oz	80 cm / 31.5 in	Yes
Zeta FL (Men's - Women's)	Hiking	N/A	4/10	6/10	4/10	6/10			No	No	No	N20r 2L Gore-Tex	Trim	221 g / 7.8 oz	76 cm / 30 in	Yes
Zeta LT (Men's - Women's)	Hiking	N/A	5/10	7/10	8/10	5/10			No	No	No	N40P-X 3L Gore-Tex	Trim	335 g / 11.8 oz	78 cm / 30.75 in	Yes
Zeta SL (Men's - Women's)	Hiking	N/A	3/10	5/10	4/10	5/10		Review	No	No	No	2L Gore-Tex	Trim	310 g / 10.9 oz	77.8 cm / 30.6 in	Yes

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

Patagonia and Arc'teryx are like up to 70% off at REI rn...
- https://www.rei.com/h/deals

The fill that take place inside the Cerium is the highest quality Arc'teryx uses (850 FP). The "850" here indicates the volume in cubic inches. It's the volume that one unit mass (ounce) of a fill occupies.

The higher fill power, the greater the insulating properties per unit mass.

One easier way to think of fill power is to think of it as a measure of loft or "fluffiness". 850 fill power is as high as the fill powers get in down jackets.

Ranking Arc'teryx down jackets from the warmest to the least warm:

Alpha line: 850 FP.
Thorium line: 750 FP.
Cerium line: 850 FP.

Cerium has a higher fill power than the Thorium, but it's less warm. Because it's equipped with less fill inside.

Arc'teryx increased the fill inside the Cerium by half an ounce (10 grams) in recent years. But it's still behind the Thorium line.

In comparison to the Atom (aka LT), however, Cerium is noticeably warmer AND lighter.

Feed

Breathability

Breathability of Atom (aka LT) is so good that it even tops other Arc'teryx synthetics like the Proton (aka LT).

Breathability of Cerium (aka LT) is horrible, just like any other down jacket.

Close up: Side fleece panels of Atom (aka LT).

It's impossible to compete Atom in terms of breathability.

Face fabrics

Arc'teryx upped the outer fabric thickness of Cerium from Arato 10 to Arato 15 in recent years. That's 50% thicker face fabric. But it's still fragile compared to Atom. I'd like to treat it more gently.

For water resistance, Atom tops Cerium, as I explained earlier.

For wind resistance, both are mediocre. When your arms are up (climbing, cycling, etc), Atom might fall behind the Cerium in this regard. Otherwise the Atom is more likely to better resist the wind.

Both come with DWR coating.

What is DWR by the way?

DWR is a coating.

It's basically sprayed on to the surface of these jackets as a finish.

It stands for Durable Water Repellent - which means that water will be repelled under wet conditions instead of soaking into the fabric.

DWR also decreases dry time.

It's a good thing these jackets are coated in DWR.

But pay attention to the fact that DWR is a coating - meaning that it will wear off over time.

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

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