Running in the Thorlos Running Mini-Crew 3-Pair Pack is smooth delight! Sold as a three-pair pack. Quarter length sits above ankle. THOR-LON throughout the body of the sock wicks moisture, keeping feet drier and reducing blisters. Aerodynamic fit and foot protection without the weight and bulk. Lightweight padding in arch provides protection and allows for better fit and arch support. Heavyweight padding at ball and heel provides protection against shock, impact and shear forces. 85 percent THOR-LON Acrylic, 13 percent Stretch nylon, 2 percent Spandex. Machine wash warm. Made in the USA.