A midlayer for anything from ski tours to alpine ascents, the Coefficient Fleece Hoody features Polartec Power Dry fleece with a gridded interior for increased wicking performance and added breathability. The under-the-helmet hood and full-length zipper let you regulate temperature on the go, so you don't find yourself overheating a half hour into the day. A slim cut helps the Coefficient Fleece Hoody fit comfortably under your shell and it easily fits in your pack. Black Diamond - Men's Coefficient Hoody