Size and Material: Size for Men's 6.5-8.5High quality material: our no show socks are made of 80% cotton, 15% elastane, and 5% spandex, they are very soft, breathable and elastic. With 200-pin knitting technology, the fabric is fine and the elasticity is very good. Socks are not easy to loosen.These socks have a good invisibility effect, they cover the middle of the instep and hardly come out of the shoes. With 200-pin knitting technology, the fabric is fine and the elasticity is very good. Socks are not easy to loosen. These socks will not fit most low cut shoes such as loafers, slippers, dress shoes, and boat shoes. The socks are perfect for everyday wear.