96% nylon 4% spandex Imported Machine wash cold, tumble dry low. Pack of 2 pairs light cushioned low cut compression fit running socks. The cushioned bottom is super soft which makes them as comfortable as cotton socks but much durable. Square toes design provides more room for your toes and seamless joint protect you from blister. Back heel tab prevent the socks from sliding into your shoes. Y heel design ensure snug fit at heel position. With high quality nylon and spandex, the socks have great stretchability. They fit men’s shoes size 6 to 11 and Women’s shoes size 7-12.