FoxRiver Men's Everyday in Line Crew Moisture Wicking Socks 50% UltraSpun polyester/48% nylon/2% spandex Made in US Smooth, flat knit construction provides lightweight comfort Ultra-lightweight, durable socks that feature a lasting, smooth fit from ultraspun polyester Wick dry moisture Management technology keeps feet dry Memory-knit construction keeps shape, wash after wash Ultraspun polyester lasts up to 28X longer than ordinary cotton; proudly made in the USA