83/17 nylon/spandex Xtreme Power performance; White is 82/18 polyester/spandex; Dri-Power® moisture-management technology; Antimicrobial; 2 1/4" elastic waist with silicone gripper technology keep jersey tucked; Internal drawcord; No fly front; Envelope thigh and knee pad system holds pads firmly in place; Mesh inserts back yoke and back of knee; Elastic cuffs;