SUITABLE SIZE : Suitable US shoe sizes 6-10. They are elastic and perfectly make it suitable for your feet. Made of high quality cotton/spandex which enhances durability, comfortability and sweat-wicking. ANTI-SLIP – Our sizing structure and extra large grip makes sure the socks stay in place no matter where you go. ANTI-SKID: Lightweight fabric, almost invisible and nicely finished seams, real no show and low cut socks. A little gel pad inside the socks, cushion on the back to protect your heels, well designed to anti-skip all day. No show socks with silicone rubber technology to prevent slipping in shoe. NO SHOW: Perfect for dance and choir shoe, sports shoes and canvas shoe, flats, loafers, etc. 100% invisible in sport shoes.