This breathable foot and ankle support with 4-way stretch features high-density, medium weight compression fabric that's copper-infused to reduce odors. With 7 zones of compression, Foot Relief provides comfortable support to help relieve muscle stiffness, soreness and pain in your heel, arch and ankle. It also helps increase circulation and reduce swelling and muscle recovery time. Wear it alone or under your socks for all-day support. Nylon, spandex & copper. Machine wash. Great for men or women. Size available in (circumference around top of the ankle) Medium (8"-10") or Large (10"-12").