Tommy John Men's Solid Over the Calf Dress Sock 65% Pima Cotton, 32% Nylon, 3% Spandex Imported Machine Wash Invisigrip technology - grips foot to ensure sock stays put Light compression - improves and increases blood flow circulation Arch support - light compression increases blood flow Zoned cushioning - increased support, comfort, and extended wear Stay Dry - zoned ventilation keeps feet cool and dry