The Women's Merino Lightweight Pant is a unique, lightweight, 2-in-1 base layer with 100% merino wool exterior and 100% LIFA Stay Warm Technology interior. LIFA Merino Lightweight is perfect for any type of activity in cold weather. A unique 2-in-1 base layer with 100% merino wool combined with LIFA Stay Warm Technology in a extremely lightweight 2 layer construction. LIFA Merino Lightweight delivers all the great benefits of merino wool fibers plus the unique properties of technical LIFA fibers.