Dr. Scholl's Men's 3 Pack Work Compression Crew Socks 50% Polyester, 46% Nylon, 4% Spandex Made in US Machine Wash Arch support to reduce fatigue(fabric content may vary) Mild compression for swollen, achy feet and legs Cushioning at heel and toe for extra comfort Cotton-free to reduce moisture absorption and irritation Free-flowing moisture dispersion technology to keep feet dry