Walkon Men's 3 to 4 Pairs Casual, Running No Show Socks, Silicon Heel Grip A great fitting sock, pure cotton socks to keep you cool and dry Made of the finest cotton and high techniclal skills, so these socks are very durable products. Designed with a Nude silicone that will prevent slipping inside of the shoe Made in Korea. Shoe size / Midium : US 7~9, Large : US 9~11