TCK Krazisox Mustache Print Over The Calf Socks 94% nylon Shoe Size: Small - Youth 12-4 Womens 4-6, Medium - Womens 6-9 Mens 5-8, Large - Womens 9-12 Mens 8-11, X-Large Womens 12+ Mens 11+ Over the Calf Length, Made in the USA Arch Compression and Heel/Toe Construction, Moisture/Odor Control Antimicrobial Blister Control, Breathable Mesh, Ergonomic Cushioning Fiber Contents: 94% Nylon, 3% Elastic, 3% Lycra Spandex