Stanfields Men's Two-Layer Wool Blend Long UnderwearThis wool blend long underwear is made from a unique two layer jersey knit fabric that offers you the ultimate in warmth and comfort. The inner layer is a blend of 50% cotton and 50% polyester for absorbency and softness next to the skin. The outer layer is a blend of 50% merino wool and 50% polyester that offers you warmth and strength. The space between layers insulates, trapping warm air from your body. The combination gives you one of the warmest