"One can never have enough socks…" Proclaim your superpowers in stealth mode with these possibly-magical socks. They're made of 75% cotton, 20% polyester, and 5% spandex. Unisex size large fits shoe sizes 8.5-12 / sock 10-13. Note: we also offer these socks in Unisex size Small, which fits sock sizes 9-11. Coordinates perfectly with our Books Turn Muggles into Wizards cap and socks!