Thorlos Women's  KX Hiking Thick Padded Crew Sock 69% Exclusive THORLON acrylic , 23% nylon, 5% spandex, 2% polyester, 1% Other Fiber Made in USA Padding Level: Maximum 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 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 Cushioning over the toes to help protect against "boot bang" on your toes (black toe) Flat knit instep and cushioning in arch for better fit, more support and less pressure on the feet for a more comfortable hike Low profile toe seam wont rub or irritate your foot