NIKE Pro Core Mezzo Waistband 3" Compression #640953-439 20% spandex Dri-FIT fabric to wick sweat away and help keep you dry and comfortable Elastic waistband for a snug, comfortable fit Lined gusset and ergonomic seams for enhanced range of motion Flat seams to help minimize irritation caused by chafing Fabric: Body: Dri-FIT 80% polyester/20% spandex. Lining: Dri-FIT 100% polyester.