The Mens Black Diamond CoEfficient Hoody is the result of packing lightweight warmth, high breathability and a super-quick dry time into a lightweight alpine layer. Made with an optimized Polartec PowerDry High Efficiency fleece fabric that's unique to Black Diamond, the CoEfficient Hoody insulates when you're stopped and helps regulate body temperature when you're on the move. So no matter what you are or aren't doing at the moment, this Black Diamond Hoody keeps you comfortable. The scuba style hood of the CoEfficient Hoodie easily fits under a helmet, so you never have to compromise safety for warmth. Should you need small essentials at the ready, you can stash them away in the zippered chest pocket. The Black Diamond CoEfficient Hoody is the ultimate thermal midlayer for fast-and-light alpine pursuits.