Cotton fiber blending with spandex, breathable, soak up sweat, stretchy and soft. Comfortable fit all day long No show socks, EXTREMELY low cut design, perfect for flats, loafers, low-profile Sperry's, low-profile Vans, low-profile Sneakers, summer high-heel shoes, ballet flats, etc. Not Slide Off: Elastic silicone gel around the top edge except for the front edge (elastic band design), keeps the socks from slipping off your foot Summer liner socks, not too thin or too thick, keep your feet cool and comfortable all day Good elasticity to fit most ladies' feet perfectly. Recommended for Shoe Size Women 6-9 US Flammi Women's Ultra Low Cut Liner Socks Cotton for Flats Ultra low cut: Perfect for flats, loafers, low-profile Sperry's, low-profile Vans, low-profile Sneakers, summer high-heel shoes, ballet flats, etc. Comfortable fabric: Made of 95% cotton/5% spandex, breathable and sweat-absorbent Nonslip: Elastic silicone gel around the top edge except for the front edge (elastic band design), keeps the socks from slipping off your foot Package content: 4 Pairs and 6 Pairs optional