Thorlos Unisex 84 N Running Thick Padded Low Cut Sock 72% Exclusive THOR-LON Acrylic , 19% Nylon, 7% Elastic, 2% Polyester Made in USA Padding Level: Maximum Cushion Key Benefits: Maximum Protection + Maximum Ventilation = 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 fibers for superior softness, resilience, durability, and moisture-wicking for drier, better feeling feet Contoured ventilated sock frame for less weight, more breathability and an aerodynamic fit together mean your feet will stay cooler Flat knit instep and cushioning in arch for better fit, more support and less pressure on the feet for a more comfortable run