Thorlos Women's  LTH Light Hiking Thick Padded Crew Sock 59% Exclusive THORWICK, 24% Exclusive THORLON, 13% stretch nylon, 4% spandex Made in US 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 Women's specific design includes extra stretch yarn in the ankle and arch, a smaller heel pocket and a smaller custom toe box for a superior fit