Nylon,Spandex Made in USA The Thorlos? Light Hiker Crew 3-Pair Pack is the ideal sock for day hikes in moderate to hot climates on flat to varied terrain. Adventure on! Sold as a three-pair pack. Crew length sits at calf. THOR??WICK? COOL fabric wicks moisture away from the skin to keep feet feeling cooler and drier. Ventilation panel enhances wicking. Lace pad protects the top of foot against boot lace pressure. Moderate cushioning in ball and heel helps reduce shock, impact, shear and blisters. Women’s specific design. 62% THOR??WICK COOL, 18% acrylic, 14% stretch nylon, 6% spandex. Machine wash cold. Tumble dry low. Made in the USA.