Elite Socks Kalily Athletic Dri Fit Crew Multi Color Choices 77% polypropylene Dri-fit, Crew Length, Blister Control Medium size fits most men/women Moisture/Odor Control Antimicrobial, Ergonomic Design Fiber Contents: 77% Polypropylene, 17% Nylon, 03% Elastic, 03% Lycra Spandex