97%Nylon,3%Spandex Made of very soft Microfiber Nylon and Spandex, to assure the best comfort all day along. Come in 2 different sizes: US Women Shoe Size5-10 and US Women Shoe Size 8-12. The Mesh patterns is breathable and moistureproof. Perfect match your Sports Shoes, Tennis Shoes, Sneakers, etc. Machine wash & air dry.