PREMIUM COTTON - Made of natural combed cotton & spandex which enhances durability, comfortability and sweat-wicking, these women no show socks are ideal for indoor and outdoor activity NOT SLIDE DOWN - Cotton low cut invisible socks with 3 silicone heel grip technology ensures non-slip and your loafer socks stay put all day long TWO SIZES AVAILABLE - Our no show women socks for flats fit US women's shoe sizes 5-8, US women's shoe sizes 8.5-11 INVISIBLE WEAR - The liner socks with basic colors creates an invisible wear inside shoes. Suitable for lady's shoes, like sneakers, loafers and sport / athletic shoes (NOTE: This socks is NOT a SUPER LOW socks for Women Flats or extreme low fashion slip-ons ) OUR SERVICE - WERNIES provides top quality and excellent customer service. If you have any questions, please contact us, we will do our best to help you solve the problem.FRIENDLY REMINDER: The first image on the page/listing represents the number of socks the buyer will receive upon purchase.