Wigwam Men's Buffalo Squared Plaid Pattern Heritage Casual Crew Sock 54% Merino Wool, 44% Nylon, 2% Spandex Made in US Machine Wash Usa manufactured with a 2 year performance guarantee Buffalo plaid inspired unique design Wigwam 100+ year legacy of proven fit, comfort and durability Features the year-around comfort and performance of merino wool Men's sock sizes - medium (fits US shoe size 5-9.5), large (fits US shoe size 9-12), x-large (fits US shoe size 12-15)