DoubleWool Longs are Aclima's warmest long underpants with an outer layer of 100% merino wool. The long underwear is made of a two-layer material and the fit is tight. The waistband at the waist has been fitted with soft merino wool on the inside against the skin for best comfort. In DoubleWool, we have combined two of our best materials, WarmWool and WoolNet. The design makes use of the best in materials, with wonderful warmth and the best moisture-transporting properties. Closest to the body is Woolnet, which forms insulating air pockets and transports moisture away from the skin. The outer fabric in WarmWool contributes with insulation and helps with further moisture transport away from the body. DoubleWool is therefore an excellent choice whether you are going on an expedition, sitting still on a hunting session or just out doing what you like most in cold weather.