LIFA Merino Midweight Pants keep you warm and dry during any type of cold weather activity, so you can get outside and stay outside longer, combining a 100% merino wool layer with proven LIFA fiber technology in a 2-layer construction. Men’s LIFA Merino Midweight 2-in-1 Base Layer Pants delivers all the breathable warmth of merino fibers, plus the unique moisture management properties of LIFA fibers.