66% Combed cotton 28% Polypropylene 6% Spandex Machine wash cold, tumble dry low. Pack of 3 pairs of lightweight anti stink quarter crew socks featuring elastic arch support, compression leg and breathable mesh at top of feet. No cushion but reinforced at toe and heel to make them durable. Titanium is blended in the yarn to provide significant anti odor effect and relieve athletes foot. It won’t be washed off and no side-effect. The combed cotton is very soft and has great perspiration absorption and the polypropylene has unidirectional moisture wicking property which can conduct the sweat quickly so that the socks can keep your feet dry. With high quality spandex, the socks have great stretchability. They fit men’s shoes size 6 to 12 and Women’s shoes size 7-13.