DUOFOLD by CHAMPION VARITHERM 2 LAYER MENS THERMAL UNDERWEAR BOTTOMS L BLACK base-layer-underwear closure Sleek expedition-weight fabric traps warmth between two thermal layers. Plus, it wicks sweat from your skin, dries quickly for chafe-free comfort, even resists garment odors. 360-degree stretch allows maximum ease of movement. Tag-free elastic waist provides added moisture control. (Has adjustable inner drawcord.) Ankle length, with non-chafe flat-lock seams. Ideal for high-motion activities. Fiber Content: 96% Polyester / 4% Spandex Bi-Ply Fabric