Bamboo and Wool have distinctly different qualities, but when combined together, they make a high performance garment you can wear year-round. Using only the long fibers of Merino wool, this product is guaranteed not to itch or shrink while keeping you warm when its cold and cool when it’s hot. An additional benefit of Merino Wool is the ability to absorb its weight in moisture and not lose any insulating qualities. Bamboo is a soft as silk, all natural defender against odor causing bacteria. This base layer is sure to become your favorite layering garment.