Sockwell Men's Backroad Crew Socks 48% Lambswool/32% Stretch Nylon/16% Alpaca/4% Spandex Made in US Spandex throughout the sock ensures an uncompromising fit from the beginning to the end of the day Ultra flat toe seam for superior in shoe comfort Alpaca and wool yarns provide unmatched natural thermoregulation and moisture management Turn welt top helps keeps the sock in place Arch support offers a comfort fit and helps keep the sock in place