Thanks KUIU for being an awesome. You guys some the best customer service out there. I would say it is a tie between my guide jacket/attack pants. I have used the guide jacket in variety of temperatures from 50F to single digits. This jacket has been with on my elk, waterfowl, upland bird, coyote , bear , and wolf hunts. I just received my attack pants last spring and I loved. These are the most comfortable pants I have worn. So I far I have used them for bear hunting, antelope hunting, and scouting.