The women’s CoEfficient Jacket is a lightweight do-anything mid layer and fleece outer sweater, built for missions that range from ski tours to autumn alpine ascents. It’s made from durable Polartec Power Dry High Efficiency fleece, which features primarily bluesign approved fabric. Black Diamond gridded the jacket’s interior to enhance its sweat wicking performance and improve breathability. The full-length zipper allows for fast temperature regulation when on the move, and lightweight stretch cuffs with integrated thumbloops allow for easy layering.