NIKE Dri-FIT Epic Lux Tights 77% nylon / 23% spandex Wide elastic waistband with internal drawcord and slash pocket for a secure fit that flatters Zip back pocket for secure storage Flat seams feel smooth against your skin as you run Reflective elements enhance visibility in low light Fabric: Body: Dri-FIT 77% nylon/23% elastane. Mesh: Dri-FIT 81% nylon/19% elastane. Gusset lining: Dri-FIT 100% recycled polyester; Machine wash