Black Diamond Coefficient Hoody, Men's M BLACK DIAMOND Coefficient Fleece Hoody Selling to organize my outdoor gear. Purchased it secondhand, and the sleeves were long, so I haven't worn it much. Gender: Men's Features: Moisture-wicking, Insulation/Warmth, UL/Ultralight, Polartec This item uses Polartec Power Dry High Efficiency. The inner surface, which touches the skin, has short, grid-like fleece, providing an excellent balance of warmth and breathability.