Picopi Men's 3 Pack Cotton Cushioned Sports Socks with Arch Support 75% cotton Made from 75% Cotton, 20% Polyester, and 5% Spandex. Machine wash warm, use non-chlorine bleach, tumble dry medium. Size 10 - 13, one size fits most. Breathable mesh-knit instep for better ventilation. Cushioned terry sole with reinforced toe and heel for comfort and durability.