TCK Sports Elite Performance Digital Camo Crew Socks High Quality: 64% Polypropylene, 27% Nylon, 7% Elastic, 2% Lycra Spandex Made in USA Shoe Size: Small fits Youth 12-5; Medium fits Mens 6-9 or Womens 7-10; Large fits Mens 9-12 or Womens 10-13; X-Large fits Mens 12-15 or Womens 13+ Moisture Control Odor Control Blister Control, Ergonomic Cushioning Arch Compression, Heel & Toe Construction, Double welt top