Good Luck Sock Men's King Size Crew Socks - Mike Tyson Punch-Out!! are 85% cotton, 10% polyester and 5% spandex. Fits shoe sizes US 13-17. Socks have reinforced heel & toe for better durability and just the right amount of stretch for all-day comfort. Machine wash cold (30 °C / 86 °F). Do not bleach or iron. Line drying will limit damage. Tumble drying may reduce lifespan.