Injinji's five-toe patented designed specifically for runners and hikers Prevents blisters & hotspots while running 32% Coolmax (polyester), 63% Nylon, 5% Lycra (spandex) Machine Wash IS261111-GRR-MD Ideal use for running, walking and athletic activities Superior mositure management during runs of all lengths Natural toe splay The Womens Lightweight No-Show toesock is a part of Injinjis Run Series designed to maximize a runners performance without sacrificing personal comfort. Recognizing that all feet are not the same, the Womens toesock is designed to better accommodate a female foot, which is typically narrower than a males foot, with an increased heel-to-toe stretch. This increased two-way stretch will enable the material to better stretch across a females foot arch, providing compression throughout the foot. The no-show length rests below the ankle and features a heel tab to protect against chafing and keep the sock from sliding into the shoe.