Ready for the long haul, the Keen North Country Medium Crew Hiking Sock features a fully cushioned footbed for support and comfort on the trail, and a seamless toe flex zone to avoid bunching and chafing. "Y"-shaped heel pockets offer added fit, while contoured arch support ensures even greater comfort. The sock's left and right design provides an optimal, versatile fit. This premium midweight hiking sock is made from a durable blend of 59% Merino wool, 35% nylon, 4% polyester, and 2% spandex fabric. Made in the USA.