This is a warm jacket. However, if you look at the Tech Specs, you'll see that it is not good for rolling in snow because it is NOT waterproof. This is will not do well if you're falling in snow all the time. If you want to do that, wear a shell over it.--Barrett Wood==========================================Read my review above. It's a really warm jacket without making you uncomfortable. I wore it inside in room temp no problems. I then went outside in the low teens, no problems. That's the amazing thing with these new state of the art synthetic insulations (like Primaloft and this).YES it stays dry when rolling in the snow. I've laid in rather mushy snow for 30 minutes with my elbows deep in it, no problem. The ripstop and DWR will keep you dry, but as with any jacket don't press your luck. It ain't Gore-Tex, but it'll do you good in moderate moisture--for sure, I'd go out in it in a dry snowstorm.....but no in a rain deluge, LOL. The insulation also stays warm when wet--unlike down.--D=============================================