Cooler and drier than cotton underwear, and perfect for multi-day trips. Designed for maximum next-to-the-skin comfort and microclimatic efficiency, this first-layer will keep you comfortable. Traps warm air next to your skin and allows moisture to be transported away Made of an advanced wicking fast-dry knit (dries three times faster than cotton). Wash out at night in any sink (they’ll be dry by morning) so you don’t have to pack as much stuff. Constructed with durable, comfortable flat seams, and shaped to eliminate bunching and wrinkling. An ideal first layer. Black. M–XL.