Mocofo Women's 3 Pairs Ultra Low Cut Hidden Flat Boat Line No Show Socks Non Slip 85%Nylon/15%Spandex Elastic Comfortable Flat Boat Line Socks of Silicone Anti-Slip Heel Grip Comfortable No-show socks for all your sneakers, boat shoes and loafers, etc Fit U.S. shoe sizes 5-8/8-13. Available in White, Skin, and Black. Machine Washable