83% Cotton, 10% Nylon, 7% Spandex Machine washable, but hand wash, hung dry recommended NO SHOW & NO SLIDING: Just covering the end of your toes, the socks are no show for most loafers, ballet flats, low cut shoes, etc. Special design of grip gel at the heel keep the socks in place. They will not slip when walking.If the socks show or slip, please contact us, we shall send you another set of socks at the right size for free, or issue a refund. Your satisfaction is our priority. SOFT & BREATHABLE: Soft elastic around the socks will not cut into your feet, you will not feel uncomfortable. Cotton socks with mesh bottom are more breathable to keep your feet clean and dry DUARABLE:The socks will not pill easily, and they are durable for a long time wearing. ADDED VALUE: HeyUU is a US registered brand, committing to providing better fashionable products and good service to our customers. The socks come in a premium quality gift box, ready for gift giving. HeyUU provides 100% satisfaction guarantee. If you are not satisfied with our products, please contact us, we shall send a free replacement or issue a full refund.