Designed for feet that hurt. Enhance mobility and maintain foot health under demanding field training and combat conditions. Constructed with THORa LONA(R) fibers for superior softness, resilience, durability and moisture-wicking for drier, better feeling feet. Unique padding in the ball and heel specifically engineered for enhanced mobility and maximum protection, clinically shown to reduce blisters, pain, pressures and moisture. Cushioning in the shin, instep and arch protects against abrasion and boot pressure and for a better fit and more comfort. Spandex top holds in place all day. Low profile toe seam won't rub or irritate feet. Specifications Length: Over-Calf Cushion: Maximum Cushion Fiber Contents: 84% Exclusive THORa LONA(R) Acrylic , 14% Stretch nylon , 2% Elastic Proudly made in the USA