SOFT & LIGHTWEIGHT: These no show socks are made with 80% cotton and have adopted 200-needle technology for tighter knitting and softer texture, extremely skin-friendly and lightweight, the breathable mesh design on the top increases moisture wicking. NON SLIP SOCKS: Applied the silicone grip technology at heel to ensure socks stay up all day long, the Y-type heel makes socks wrap around your heel and fit comfortably, prevent the socks slipping into your shoes. ANTI-HOLE PROTECTION: The low cut socks have reinforced in toe and heel areas for better durability and extending lifespan of the socks, we suggest you order one size larger if you don't wanna the socks stretch too much when wearing. INVISIBLE WEAR: These liner socks are no show socks, that means "no show" for sports shoes and most of casual shoes, such as trainers and sneakers, not for boat shoes and very low cut shoes. All-Day Comfort: Designed for daily wear with a snug, comfortable fit from morning to night. Suitable for walking, work, commuting, light exercise, or travel. Includes 6 pairs, unisex, US sizes S (5–7), M (7–10), L (9–12), and XL (12–15).