Wigwam Men's at Work Rigger Crew Sock 65% Acrylic, 19% Nylon, 10% Polypropylene, 5% Tencel, 1% Spandex Made in US Machine Wash Made in the USA Moisture wicking acrylic is soft, fast drying and durable Odorgaurd antimicrobial treatment, kills bacteria and odor Reinforced heel and TOE Seamless TOE closure