Gore-tex vest ive been wearing one for a few years now, works really well the one i have is fairly light weight keeps my core warm so i don't have to wear multiple thick layers. http://www.bergsskishop.com/mountain...2457c2128.html this one is similar to the one i have mines a different model but mountain hardwear brand, i wear merino/polypro mid weight under it with a columbia rain shell down to about 0f and stay comfortable.