CoEfficient Jacket Men's

Black Diamond's CoEfficient Jacket is a fast wicking, highly breathable midlayer, that uses Polartec PowerDry High Efficiency fleece to provide extremely efficient insulation with little weight or bulk. This full zip layer features a slim fit for added comfort when you wear it under your shell, and the stretch cuffs keep the sleeves in place when you're leading a crux pitch in the middle of an alpine route.