76% Nylon, 24% Spandex * Recover Quicker, Perform Better. Passive compression delivers more oxygen-rich blood to your resting muscles, significantly reducing delayed onset muscle soreness and accelerating recovery time. * Goodbye Jetlag. Better circulation significantly reduces swelling and dehydration (2 primary causes of jetlag) on long haul flights. * Cold machine wash, gentle cycle, with like colors. Do not bleach, iron, or tumble dry.