The Over Calf Ultra Light sock from Thorlos is a step-up from the everyday normal sock. Sold as a three-pair pack. For feet that dont hurt, designed specifically for light day hikes or casual street wear. THOR-WICK COOL fabric wicks moisture away from the skin to keep feet feeling cooler and drier. Lightly padded in the ball and heel area to specifically protect the impact zone of healthy feet. Cushioned arch for a better fit, more support and added comfort. Low profile toe seam wont rub or irritate feet. 75 percent THOR-WICK COOL, 18 percent stretch nylon, 4 percent Spandex, 3 percent Thor-Lon Acrylic. Machine wash warm, tumble dry low. Made in the U.S.A. Made in the USA.