? Size Guideline : S Size: Women & Men’s 4-7 / M Size: Women & Men’s 7-9 / L Size: Women & Men’s 9-13 ? 85% cotton, 3% polyester, 12% spandex ? Made from eco-friendly material,Socks are breathe freely ,absorb sweat and stink prevention ? We have been improving the socks last year, striving to make them more comfortable and better fitting. thank you for all your feedbacks, they give us the direction and motivation to upgrade our socks.