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. 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. ANTI-SKID: Lightweight fabric, almost invisible and nicely finished seams, real no show and low cut socks. A little pad in heels, cushion on the back to protect your heels, well designed to anti-skip all day.