TCK Sports Baseline 3.0 Multisport Elite Performance Crew Socks High Quality: 79% Polypropylene, 13% Nylon, 6% Elastic, 2% Spandex 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+ Made in USA Blister Control, Ergonomic Cushioning Moisture Control, Odor Control, Antimicrobial, Breathable Mesh Arch Compression, Heel & Toe Construction, Double welt top