Thorlos Unisex LTHMX Light Hiking Thick Padded Ankle Sock 63% Thor-Wick COOL Polyester, 18% Thor-Lon Acrylic, 15% Nylon, 4% Elastic Turn Inside Out-Machine Wash-Use Liquid Fabric Softner Padding Level: Moderate Cushion Key Benefit: Thorlos Protection = Maximum Comfort Guarantee - Your feet will feel better or your money back! Proudly MADE in the USA | North Carolina Thorlos clinically-tested padding under the ball and heel provides maximum protection from friction, the primary cause of blisters, and impact protection where needed most Constructed with THORLON blended with THORWICK COOL fibers for superior softness, resilience, durability and extra moisture-wicking for drier, cooler, better feeling feet. Cushioned instep and arch for a better fit, more support and less pressure on the feet for a more comfortable day hike Low profile toe seam won't rub or irritate the feet Ventilation panel for extra moisture control and breathability Fiber Contents: 59% Exclusive THORWICK, 24% Exclusive THORLON, 13% stretch nylon, 4% spandex