The benchmark in its class, the Merino 200 Oasis fly legging is a very comfortable icebreaker base layer that forms the perfect foundation for our everyday cold-weather layering system. Made from breathable, insulating and odor-resistant 100% merino jersey (except for the waistband), this Oasis garment offers a snug fit and features gussets for unlimited freedom of movement. The brushed elastic waistband and flat seams prevent chafing. Inspired by nature, icebreaker harnesses the performance qualities of natural fibers and offers an alternative to garments made from petrochemical synthetic fabrics. Merino wool is an annually renewable fiber that naturally resists odors, keeping you cool when it's hot and warm when it's cool. Plus, it lets your skin breathe comfortably all day, every day.