The excellent two-layer Devold DUO ACTIVE MERINO 210 LONGS will simply put you at ease. Are you a fan of skiing, snowboarding, ski mountaineering, hiking and other winter and autumn activities? Then this base layer in the form of underpants is what you are looking for. Two types of knit fabric with different properties are attached together. The inner layer is made of ThermoLite fibre which is very soft and sweat wicking. The Merino wool top layer is insulating, absorbent, and sweat wicking.