This U.S. Postal Service Certified Over-the-Calf Compression Sock is black, lightweight, eliminates rubbing / chaffing and helps to evaporate moisture. 43% Nylon, 23% Thor Wick Cool Copper Infused Polyester (CuTEC), 12% Copper Polyester, 11% Polyester, 11% Elastic Color: Black, Fits Shoe Sizes: Small (Women's 7-9 / Men's 6-8), Medium (Women's 9.5-11.5 / Men's 8.5-10) and Large (Men's 10.5-11.5).
It has the following features:
Triple-zone graduated compression: Encourages increased blook circulation in the leg. Mid-foot compression and arch wrap support the plantar fascia tendon. Stabilizing ankle wrap reduces ankle strain and turn.