Injinji is a California-based company that makes toesocks for runners and other active people. Injinji's patented five-toe sock design is meant to improve the freedom and natural function of the foot inside any shoe. The socks are made with cool mex, a moisture-wicking polyester material, that helps keep feet cool and dry. The five-toe sleeve design separates and wraps each toe, preventing skin-on-skin friction. The separation of the toes also allows for natural splay so that weight is more evenly distributed in each step.