Sockwell Women's Sheer Bias Micro Socks 35% Stretch Nylon, 30% Bamboo Rayon, 30% Stretch Nylon, 5% Spandex Made in US Ultra flat toe seam for superior in shoe comfort Arch support offers a comfort fit and helps keep the sock In place Non cushion sole Turn welt top helps keeps the sock in place Spandex throughout the sock prevents slippage and ensures a snappy fit throughout the day