 This product is designed for extended hikes in moderate climates on varied or rugged terrain. This product provides the most protection available, beyond what any other sock can provide today. Midweight padding in the heel and ball protect the foot from shear and impact forces and prevent blistering. Lace pad protects the top of the foot against boot lace pressure. Ventilation panel enhances wicking Content: THORLON 87% Acrylic, 11% Stretch Nylon, 2% Spandex |