76% Nylon, 24% Spandex * World class comfort. 400 Series fit technology, specifically placed Memory MX panels, taped and bonded hems and waistbands come together in the most comfortable recovery garment ever created. * Scientifically proven 400 Series Technology significantly increases delivery of oxygen-rich blood to recovering muscles and accelerates lactic acid removal, eliminating muscle soreness and fatigue after training. * Cold machine wash, gentle cycle, with like colors. Do not bleach, iron, or tumble dry.