MATERIAL: Top: 93% Nylon 7% Spandex; Bottom: 95% cotton 5% Spandex; they are cool, soft and smooth. Please note these are THIN socks, which are of high quality, providing maximum comfort for daily use. | UNIQUE DESIGN: Premium cotton base and nylon blend splicing technology, it contributes extreme soft, comfort, strongly breathable feeling and with great ability of sweat absorption. Nylon socks keep your foot dry all day. | NON-SLIP GUARANTEED: Silicone gel circle to prevent the liner socks womens slipping in shoe. Our silicon is registered by FAD, it is eatable, no irritation to your skin. | NO SHOW GUARANTEE & GIFT: Low-cut Shoe Shape design keep no show thin socks perfect for sneakers, dress shoe, canvas shoe, boat shoe, flats and loafers, high-heel shoe, etc. Premium no show nylon socks for women will be a perfect gift for upcoming holidays or any other events. | SIZE & SATISFACTION GUARANTEE: Two different sizes are available. Our thin footies socks for women are fully stretchy and S for US women's shoe sizes 5-8 and M for US women's shoe sizes 9-11. Your satisfaction is our topmost priority. If you do not like our nylon footies for any reason, we will offer a full refund or free replacement. No questions asked.