Sockwell Men's Slim Jim Socks 34% Merino Wool/34% Bamboo Rayon/27% Stretch Nylon/5% Spandex Made in US Turn welt top helps keeps the sock in place Seamless toe closure offers a smooth and comfortable fit Arch support offers a comfort fit and helps keep the sock In place Light cushioned sole added for comfort Spandex throughout the sock prevents slippage and ensures a snappy fit throughout the day