Made with shock-absorbing cushion, soft heel tab, and compression band.

S/M fits women's shoe size 5-9/men's shoe size 4-8.

L/XL fits womens's shoe size 9-13/men's shoe size 8-12.

39% recylced polyester (made from post consumer platic bottles!), 39% cotton, 19% nylon, 3% spandex.