Helly Hansen LIFA Merino Midweight Pants perform in any type of cold weather activity so you can get outside and stay outside. Combining a 100% merino wool layer with proven LIFA Stay Warm Technology in a 2-layer construction. LIFA Merino Midweight delivers all the breathable warmth of merino wool fibers, plus the unique moisture management properties of LIFA fibers. These base layer pants are fitted for optimal mobility without bulk.