Lucy Women's Jog for Joy Ls 50% Polyester/43% Nylon/7% Spandex Imported Machine Wash Lucy tech is moisture-wicking and great for high-sweat activities Reflectivity helps keep you visible at night Cinchable draw cord keeps hem in place Thumbholes to keep sleeves in place Chafe-free flat lock seams, fabric type is 43 percent nylon 50 percent polyester 7 percent spandex