Bombas Black Crew/Calf Socks Cotton Blend Unisex Large L Pack of 4 Classic Bombas socks. Unisex. Length: Calf/Crew Color: Black Size: Large (L) Midweight 63% Supima Cotton, 21% Nylon, 14% Polyester, 2% Elastane Machine wash, cold, gentle cycle. I package carefully and ship quickly. 504-3