76% Nylon, 24% Spandex * More oxygen to your muscles. World"s first Dynamic Gradient Compression delivers more oxygen-filled blood to active muscles, increasing endurance, power, and efficiency. * Specifically placed Memory MX panels offer maximum support to key muscle groups and help reduce IT Band Friction Syndrome (ITBFS). * Cold machine wash, gentle cycle, with like colors. Do not bleach, iron, or tumble dry.