DoubleWool longs leggings M'sDoubleWool Longs are Aclima's warmest long johns with an outer layer of 100% merino wool. The long johns are made of a two layer material and the fit is tight. The waistband at the waist has been provided with soft merino wool on the inside against the skin for the best comfort. In DoubleWool we have combined two of our best materials, WarmWool and WoolNet. The design takes advantage of the best in the materials, with lovely warmth and the best