Comfortable and slim-fitting underpants that form the perfect base for your four-season layering system. Thanks to icebreaker's 100% merino jersey, the Oasis is breathable, insulating and odor-resistant. Plus, a softly brushed elastic waistband and flat seams provide an all-around soft feel. Inspired by nature, icebreaker harnesses the functional properties of natural fibers to offer an alternative to synthetic clothing. Merino wool is an annually renewable fiber that naturally counteracts odor. It cools in the heat and warms in the cold, allowing the skin to breathe and providing lasting comfort.