20-30mmHg Compression Venosan Athletic unisex compression socks are high performance compression socks, designed for everyday wear, travel, athletic need, mild edema, prevention and treatment of mild venous symptoms, heaviness and fatigue in the legs. Compression socks are well known to improve circulation to the legs, and to prevent lactic acid buildup during exercise. 75% Nylon, 12% Polyester, 13% Spandex.