Aetrex Non-Binding Ankle Socks with extra cushioning in the foot are an excellent choice for individuals with diabetes or sensitive feet. The non-binding yarns won't constrict the leg and toe seams are hand-linked for extra protection. Aetrex socks with Copper Sole Technology are unsurpassed in comfort performance and protection. Copper socks have been tested and found to eliminate 99.9% of bacteria and fungi providing superior odor protection. As the fiber wears copper ions in the Cupron yarns regenerate creating a permanent protective barrier for the life of the sock. Acrylic polyester, Cuporn polyester, nylon, spandex.