- Familiarity: I've used it several times
Nice lightweight jacket. Love the athletic fit. Keeps me warm with a shell down to about 35 when not engaged in aerobic activity.Of course, you'd buy a jacket like this for when you're engaged in aerobic activity - my Montbell Ultralight keeps me warmer and is lighter, but is useless if I get it sweaty. It seems like it's fitted to be inside Arcteryx winter shells - it fits perfectly inside the Beta AR (the hood fits perfectly inside the Beta AR hood). It could also be used inside a lighter weight shell, but the hood doesn't really fit nicely inside the Beta SL hood. 6'3" 210 lbs and the XL is perfect.