Snow fusion ultra lite is an ultra-lightweight ski and snowboard sock. The ultimate fusion construction knits a liner and outer sock together as one piece of fabric. This patented design keeps feet dry and warm on the slopes. The outer sock layer is constructed of a merino wool blend and the liner is 100 percent olefin for moisture management and durability. If you demand performance and durability, this is the sock for you. Wigwam began making socks in 1905 and is still going strong as a 4th generation family run USA manufacturer located in Sheboygan, Wisconsin. They are knowledgeable, experienced and state of the art manufacturers using American union labor and as many USA sourced materials as possible. They also run their business in an environmentally responsible way. Wigwam socks carry a lifetime guarantee. For more information call 1-800-558-7760