Arc'teryx Dually Belay Parka Review: A long gone belay parka

Dually Belay (Men's) can be a great choice for stationary use out in temperatures down to 0 deg F (-18 deg C). Bonus: It doesn't lose its insulating capability under wet conditions, unlike down insulated jackets.

#Note: Find full Arc'teryx review list at the bottom.

Summary

Dually Belay Parka is the warmest synthetic insulated piece in the Arc'teryx line-up. It's also the 3rd warmest in Arc'teryx's entire insulated jacket family (excluding this monster from Arc'teryx LEAF, as its "too technical").

Dually Belay is also my top Arc'teryx pick for extreme colds, as you can see here: https://outdoorcrunch.com/best-arcteryx-jacket/

Warmth

First thing you should know about Dually Belay is that it's stupid warm.

It's equipped with ThermaTek (exclusive to Arc'teryx), which provides a superior insulation capability than other insulation filaments such as the Coreloft.

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)	Discontinued?
Arc'teryx Alpha Parka (Men's - Women's)	-18/-28	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	No
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	No
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	No
Arc'teryx Atom Heavyweight (aka 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	No
Arc'teryx Atom Lightweight (aka 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	270 g / 9.5 oz	72 cm / 28.3 in	No
Arc'teryx Beta Down Insulated (Men'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	No
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	No
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	No
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	No
Arc'teryx Coelle (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	No
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	No
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	No
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	No
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	No
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	No
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	No
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	No
Arc'teryx Proton Lightweight (aka FL) (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	No
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	No
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	No
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	No
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	No
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	No
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	No
Black Diamond Access Down (Men's - Women's)	7/-14		No	Yes	Yes	Down	700	155	3,827	N/A	N/A	30D ripstop nylon	All Round	Regular	442 g / 15.6 oz	76 cm / 29.75 in	No
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	?	No
Feathered Friends Khumbu (Men's)	-17/-27		No	No	Yes	Down	900	378	12,000	Primaloft Gold	200 g	Pretex Shield XT	All Round	Regular	960 g / 2 lb 2 oz	?	No
Mountain Equipment Exo (Men's)	-10/-23		No	Yes	Yes	Down	800	265	7,478	N/A	N/A	Nylon	All Round	Regular	770 g / 1 lb 11.2 oz	79 cm / 31 in	No
Mountain Equipment K7 (Men's)	-13/-25		No	Yes	Yes	Down	800	300	8,466	N/A	N/A	30D Drilite	All Round	Regular	820 g / 1 lb 13 oz	76 cm / 30 in	No
Mountain Hardwear GW/2 (Men's - Women's)	28/-2		No	No	Yes	Down	800	85	2,399	N/A	N/A	10D Ripstop Nylon	All Round	Trim	250 g / 8.8 oz	70 cm / 27.5 in	No
Outdoor Research Sup. Alp. (Men's - Women's)	3/-16		No	Yes	No	Down	800	182	5,136	N/A	N/A	30D Pertex Quantum Pro	All Round	Regular	825 g / 1 lb 13.1 oz	85 cm / 33.5 in	No
Patagonia AlpLight (Men's - Women's)	36/2		No	No	Yes	Down	800	100	2,822	N/A	N/A	0.8 oz 10D polyester	All Round	Slim	270 g / 9.5 oz	74 cm / 29 in	No
Patagonia AlpLoft (Men's)	-10/-23		No	Yes	Yes	Down	800	295	8,325	N/A	N/A	Pertex Quantom	All Round	Regular	680 g / 1 lb 8 oz	81 cm / 31.8 in	No
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	Pertex Quantum Pro	All Round	Regular	555 g / 1 lb 3.6 oz	84 cm / 33 in	No
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	No
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	No
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	?	No
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 / 1lb 6.3 oz	74 cm / 29 in	No
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	No
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	No
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	?	No
Patagonia Micro Puff (Men's - Women's)	41/5	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	PlumaFill	65 g	Pertex Quantum	All Round	Regular	298 g / 10.5 oz	75 cm / 29.5 in	No
Patagonia Nano Air (Men's - Women's)	41/5	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	FullRange	60 g	33D nylon ripstop	All Round	Trim	401 g / 14.14 oz	?	No
Patagonia Nano Air Light Hybrid (Men's - Women's)	50/10		No	No	No	Synthetic	N/A	N/A	N/A	FullRange	40 g	20D nylon ripstop	All Round	Trim	335 g / 11.8 oz	?	No
Patagonia Nano Puff (Men's - Women's)	37/3	Review	No	No	Yes	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	No
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	No
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	?	No
Patagonia Tres 3-in-1Patagonia 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	No
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	No
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	No
Rab Infinity Alpine (Men's)	5/-15		No	Yes	Yes	Down	800	175	4,938	N/A	N/A	30D & 13D Gore-Tex Infinium	All Round	Regular	551 g / 1 lb 3.4 oz	76.5 cm / 30.1 in	No
Rab Infinity Microlight (Men's - Women's)	19/-7		No	No	Yes	Down	700	146	3,605	N/A	N/A	13D Gore-Tex Infinium	All Round	Regular	452 g / 15.9 oz	74 cm / 29.1 in	No
Rab Microlight Alpine (Men's - Women's)	7/-14		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	No
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	No
Rab Positron Pro (Men's)	-13/-25		No	Yes	Yes	Down	800	300	8,466	N/A	N/A	40D Pertex Quantum Pro	All Round	Regular	740 g / 1 lb 10 oz	85 cm / 33.5 in	No
REI Magma 850 Hoodie 2.0 (Men's - Women's)	14/-10		No	No	Yes	Down	850	120	3,598	N/A	N/A	Pertex mini ripstop nylon	All Round	Regular	340 g / 13.75 oz	74 cm / 29.25 in	No

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)	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)	Discontinued?
Arc'teryx Alpha Parka (Men's - Women's)	-18/-28	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	No
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	No
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	No
Arc'teryx Atom Heavyweight (aka 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	No
Arc'teryx Atom Lightweight (aka 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	270 g / 9.5 oz	72 cm / 28.3 in	No
Arc'teryx Beta Down Insulated (Men'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	No
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	No
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	No
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	No
Arc'teryx Coelle (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	No
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	No
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	No
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	No
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	No
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	No
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	No
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	No
Arc'teryx Proton Lightweight (aka FL) (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	No
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	No
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	No
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	No
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	No
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	No
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	No
Black Diamond Access Down (Men's - Women's)	7/-14		No	Yes	Yes	Down	700	155	3,827	N/A	N/A	30D ripstop nylon	All Round	Regular	442 g / 15.6 oz	76 cm / 29.75 in	No
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	?	No
Feathered Friends Khumbu (Men's)	-17/-27		No	No	Yes	Down	900	378	12,000	Primaloft Gold	200 g	Pretex Shield XT	All Round	Regular	960 g / 2 lb 2 oz	?	No
Mountain Equipment Exo (Men's)	-10/-23		No	Yes	Yes	Down	800	265	7,478	N/A	N/A	Nylon	All Round	Regular	770 g / 1 lb 11.2 oz	79 cm / 31 in	No
Mountain Equipment K7 (Men's)	-13/-25		No	Yes	Yes	Down	800	300	8,466	N/A	N/A	30D Drilite	All Round	Regular	820 g / 1 lb 13 oz	76 cm / 30 in	No
Mountain Hardwear GW/2 (Men's - Women's)	28/-2		No	No	Yes	Down	800	85	2,399	N/A	N/A	10D Ripstop Nylon	All Round	Trim	250 g / 8.8 oz	70 cm / 27.5 in	No
Outdoor Research Sup. Alp. (Men's - Women's)	3/-16		No	Yes	No	Down	800	182	5,136	N/A	N/A	30D Pertex Quantum Pro	All Round	Regular	825 g / 1 lb 13.1 oz	85 cm / 33.5 in	No
Patagonia AlpLight (Men's - Women's)	36/2		No	No	Yes	Down	800	100	2,822	N/A	N/A	0.8 oz 10D polyester	All Round	Slim	270 g / 9.5 oz	74 cm / 29 in	No
Patagonia AlpLoft (Men's)	-10/-23		No	Yes	Yes	Down	800	295	8,325	N/A	N/A	Pertex Quantom	All Round	Regular	680 g / 1 lb 8 oz	81 cm / 31.8 in	No
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	Pertex Quantum Pro	All Round	Regular	555 g / 1 lb 3.6 oz	84 cm / 33 in	No
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	No
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	No
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	?	No
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 / 1lb 6.3 oz	74 cm / 29 in	No
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	No
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	No
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	?	No
Patagonia Micro Puff (Men's - Women's)	41/5	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	PlumaFill	65 g	Pertex Quantum	All Round	Regular	298 g / 10.5 oz	75 cm / 29.5 in	No
Patagonia Nano Air (Men's - Women's)	41/5	Review	No	No	Yes	Synthetic	N/A	N/A	N/A	FullRange	60 g	33D nylon ripstop	All Round	Trim	401 g / 14.14 oz	?	No
Patagonia Nano Air Light Hybrid (Men's - Women's)	50/10		No	No	No	Synthetic	N/A	N/A	N/A	FullRange	40 g	20D nylon ripstop	All Round	Trim	335 g / 11.8 oz	?	No
Patagonia Nano Puff (Men's - Women's)	37/3	Review	No	No	Yes	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	No
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	No
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	?	No
Patagonia Tres 3-in-1Patagonia 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	No
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	No
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	No
Rab Infinity Alpine (Men's)	5/-15		No	Yes	Yes	Down	800	175	4,938	N/A	N/A	30D & 13D Gore-Tex Infinium	All Round	Regular	551 g / 1 lb 3.4 oz	76.5 cm / 30.1 in	No
Rab Infinity Microlight (Men's - Women's)	19/-7		No	No	Yes	Down	700	146	3,605	N/A	N/A	13D Gore-Tex Infinium	All Round	Regular	452 g / 15.9 oz	74 cm / 29.1 in	No
Rab Microlight Alpine (Men's - Women's)	7/-14		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	No
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	No
Rab Positron Pro (Men's)	-13/-25		No	Yes	Yes	Down	800	300	8,466	N/A	N/A	40D Pertex Quantum Pro	All Round	Regular	740 g / 1 lb 10 oz	85 cm / 33.5 in	No
REI Magma 850 Hoodie 2.0 (Men's - Women's)	14/-10		No	No	Yes	Down	850	120	3,598	N/A	N/A	Pertex mini ripstop nylon	All Round	Regular	340 g / 13.75 oz	74 cm / 29.25 in	No

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 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
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 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 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
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
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
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	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
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
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 (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	No
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
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
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
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
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
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
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
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
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
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
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 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
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
Beta Long	All Round	N/A	4/10	9/10	No data	3/10		Review	No	No	No	N80p 3L Gore-Tex	Regular	441 g / 15.6 oz	85 cm / 33.5 in	Yes
Beta LT Hadron	All Round	N/A	7/10	6/10	4/10	5/10			No	No	No	Hadron 3L Gore-Tex	Fitted	255 g / 9 oz	76 cm / 30 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
Andessa (Women's)	Skiing	8/-13	10/10	No data	No data	1/10			Yes	No	No	N40d 3L Gore-Tex	Trim	869 g / 1 lb 14.7 oz	67 cm / 26.4 in	Yes
Andessa Shell (Women's)	Skiing	N/A	5/10	No data	No data	3/10			No	No	No	N70p 3L Gore-Tex	Trim	560 g / 1 lb 3.8 oz	?	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
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
Cassiar (Men's)	Skiing	N/A	8/10	7/10	8/10	3/10		Review	Yes	No	No	N70p 3L Gore-Tex	Trim	820 g / 1 lb 12.9 oz	74.5 cm / 29.3 in	Yes
Cassiar LT (Men's)	Skiing	N/A	6/10	6/10	6/10	5/10		Review	Yes	No	No	N70p 3L Gore-Tex	Trim	605 g / 1 lb 5.3 oz	75 cm / 29.5 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
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
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
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
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
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
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
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
Indencia IS	Skiing	No data	No data	No data	No data	No data			Yes	No	No	N80p 2L Gore-Tex	Regular	?	78 cm / 30.75 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
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 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
Cita (Women's)	Running	N/A	7/10	4/10	5/10	10/10		Review	No	No	Yes	Lumin	Trim	120 g / 4.2 oz	67.5 cm / 26.5 in	Yes
Cita SL (Women's)	Running	N/A	7/10	4/10	4/10	10/10		Review	Yes	No	Yes	Permeair 20	Trim	65 g / 2.3 oz	61.5 cm / 24.2 in	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
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
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 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 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
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 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

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

Not only the insulation filament used in Dually Belay is premium, but also the amount of this insulation is generous (92 g/m²).

And even this is not the end point for this parka in terms warmth.

Feed

In addition to all these, the abundant insulation material used in the Dually Belay is spread through not one but two layers.

Must see before making up your mind: Jacket Finder tool at arcteryx.com

If you're familiar with my post about the working principles of insulated jackets, then you already know that this is a huge advantage for warmth. Because the air trapped in between the layers is also leveraged to work as an extra layer of insulation.

If you paid enough attention to your Thermodynamics class in school, then you already know what I'm talking about. Air makes up a perfect insulation material.

Fit

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

Arc'teryx's 2024 men's fit revision

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

Source: https://arcteryx.com/us/en/help/sizing/mens/tops/new

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

Being able to trap air between the two layers, Dually Belay leverages this very advantage of using the air as extra insulation. An important advantage which (to my knowledge) no other jacket can achieve on their own due to their single layered structure.

This is actually also the primary advantage of layering, and the reason why it's praised by outdoor enthusiasts so much.

One of the most important upsides to layering is the advantage of being able to trap air between the layers, have that air heated by your body, and ultimately leverage that air as extra insulation.

This is a great extra warmth with no costs (such as extra weight).

To summarize...

Dually Belay is... WARM. Mind you, though, if you're like most people, for temperatures over 20 deg F (-7 deg C), it can even be TOO WARM for most of you!

Weather Resistance

Dually Belay is equipped with 30 denier nylon face fabric. This is quite a bit wind and water proof, although not as waterproof as another similar Arc'teryx jacket Fission SV (more on this later).

Dually Belay is made in Canada!

It's one of very few Arc'teryx jackets made in outside Asia.

See the manufacturing locations for all Arc'teryx jackets here: https://outdoorcrunch.com/where-is-arcteryx-made/

Dually Belay is also DWR coated.

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.

In summary, I'd highly doubt you'll experience any problems in terms of water and wind resistance inside this jacket. Synthetic insulated jackets are known for being very resistant to wet weather conditions.

Alternatives

There's only one TRUE alternative to Dually Belay Parka, and it's the Fission SV (Men's - Women's - read my review).

I evaluated Fission SV's temperature rating as well, and found it to be 3 deg F (-16 deg C). Whereas that of Dually Belay is lower at 0 deg F (-18 deg C), as mentioned earlier in this post.

As you see, Fission SV still very warm, though it isn't as warm as Dually Belay.

Must see before making up your mind: Jacket Finder tool at arcteryx.com

Now although the Fission SV isn't as warm as the Dually Belay (as you see), it does get ahead of Dually Belay in one department: Waterproofing. Fission SV is noticeably more waterproof than the Dually Belay.

In fact, it's the warmest fully waterproof Arc'teryx jacket.

Another advantage of Fission SV is that it's also offered in women's specific counterpart, unlike Dually Belay which is only offered for men.

Here's the product video for Dually Belay Parka: