The Actifi Athletic 20-30 Compression Socks are perfect for running, walking, working out, travelling, pregnancy, nurses, people with varicose veins, and shin splints. Featuring 20-30 mmHg graduated compression, these compression socks for men and women compress tightest at the ankle and reduce gradually towards the top on the calf – this compression hugs the legs to help circulate blood flow from the feet towards the heart. In addition, this frim compression from the ankle upwards helps reduce vibrations while increasing coordination by keeping the ankle and calf firm, stabilizing muscles and joints to prevent injuries. 75% Nylon, 13% Spandex, 12% Polyester. Latex Free. MADE IN USA Performance Compression for All Day Wear