Yolev Women Invisible Low Cut Socks, Non Slip No Show Liner Socks for Flats Boat, 5-6 Pairs Ultra Low Profile Socks: 5 Packs is Combined 80% good cotton with spandex, 6 Packs is Combined 98% good nylon with 2% spandex. Allows your feet to breathe and stay comfortable all day long. Considerate Design: Lightweight fabric, almost invisible and nicely finished seams, real no show and low cut socks. Well designed to stay on all day without slipping. Premium Material : Thin enough, won't alter the shoes comfort, and thick enough to be soft and comfortable, absorbent and anti-odor even when your feet perspire. Prominent Features: Low cut socks are perfect for high heels, dance and choir shoe, ballet flats, boat shoes, floaters, canvas shoe or sneakers etc. Sizes based on US Women's Shoe Sizes: 5.5-9 ( 6 Pairs ), 5-9( 5 Pairs )