With the Bat Moose Crew Sock you can smuggle some sass into everyday wear. Made from a quality blend of 75% cotton, 15% nylon and 10% spandex.a 75% Cotton, 15% Nylon, 10% Spandexa Contrasting Heel & toea 2 ply yarn for comfort & durabilitya PreshrunkSizes:One size - Women Shoe 5-10XL - Women Shoe 10-12.5One size - Men Shoe 4.5-7.5XL - Men Shoe 8-12