NIKE Women's Epic Lux Flash Running Tights Body: Dri-FIT 77% nylon/23% spandex. Lower leg panel/waistband: Dri-FIT 78% nylon/22% spandex. Gusset lining: Dri-FIT 100% recycled polyester. Dri-FIT fabric to wick away sweat and help keep you dry and comfortable Lined inseam gusset for natural range of motion