Wigwam Men's Pacific Crest Pro Lightweight Outdoor Peak 2 Pub Crew Sock 47% Nylon, 30% Merino Wool, 17% Polyester, 4% Spandex, 2% Lyocell Made in US Machine Wash Usa manufactured with a 2 year performance guarantee The combination of merino wool and patented dri release engineered blend keeps feet dry, odor and blister free Wigwam 100+ year legacy of proven fit, comfort and durability Peak 2 pub versatility 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)