Champion Men's Extreame Compression Short polyester base-layer-underwear closure Super-sleek fabric stretches four ways for flexible ease of movement. Built-in Double Dry system wicks sweat away from your skin. Breathable mesh panels add cooling ventilation. Plush-lined elastic waist allows comfort at every stride. 9-inch inseam, with non-chafe flat-locked seams. Close-to-body fit  ideal base layer. BODY: 5.6-oz. 84% polyester/16% spandex. PIECING: 4.9-oz 92% polyester/8% spandex stretch mesh