This Thorlos Running Crew 3-Pair Pack of socks will keep you on the move and chasing your next mile stone. Crew socks that sit at the calf. Sold as a three-pair pack. THOR-LON throughout the body of the sock wicks moisture, keeping feet drier and reducing blisters. Lightweight padding in arch provides protection and allows for better fit and arch support for a more comfortable run. Heavyweight padding at ball and heel provides protection against shock, impact and shear forces. Low profile toe closure lies flat to reduce chafing and has minimal bulk. 88 percent THOR-LON acrylic, 10 percent stretch nylon, 2 percent spandex. Machine wash, tumble dry. Made in the USA.