Thorlos Unisex TRHXM Trail Hiking Thick Padded Crew Sock 59% Thor-Lon Acrylic, 21% Thor-Wick COOL polyester, 16% Nylon, 4% Elastic Made in USA No Closure closure Turn Inside Out-Machine Wash-Use Liquid Fabric Softner Padding Level: Thin Cushion Key Benefit: Thorlos Protection = Comfort Guarantee - Your feet will feel better or your money back! Proudly MADE in the USA | North Carolina Constructed with THORWICK COOL fibers for superior moisture-wicking for drier, cooler feet Padding in the ball and heel specifically engineered to protect the impact zone of healthy feet Cushioned arch for a better fit, more support and more comfort Low profile toe seam won't rub or irritate feet Rib-knit cuff Fiber Contents: 77% Exclusive THORWICK COOL, 16% stretch nylon, 7% spandex