I bought this vest and 3 others to compare and see which I liked best. I tried them all on the same day skiing, so all other factors were the same. I wore them under a shell with a wool sweater underneath. This vest basically did nothing, wasn't nearly as warm as the other down vests I tried. It was cheaper than the down vests, but I found it to be just wasting space and an extra pointless layer. For a fashion statement I guess its nice, but if you want to stay warm then look elsewhere.