Wigwam Women's Buffalo Squared Plaid Pattern Heritage Casual Crew Socks 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 plus year legacy of proven fit and 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)