The men's trailhead pro merino wool ultimax trail sock is a lightweight outdoor trail and lifestyle sock. It features the benefits of merino wool enhanced by the addition of dri-release with tencel for rapid moisture evaporation keeping your feet dry and comfortable. Wigwam is a 110 year old 3rd generation family run USA manufacturer in Sheboygan, Wisconsin. Wigwam is a state of the art manufacturer using American union labor and as many USA sourced materials as possible. They also run their business in an environmentally responsible way. These socks carry a 2-year performance guarantee. For more details visit www.wigwam.com.