A soft, ultra-fine merino wool interior next to the skin wicks moisture and insulates as the merino fibers expand and contract with your body heat. A quick-dry synthetic exterior provides strength and durability. This natural odor-resistant fabric is a base layer that manages moisture during high output pursuits on the water when temperatures are cold. This top is finished with an elastic cuff that gives both a tailored fit and structure to the wettest part of our kit. This top does have a nice stretch and will be the warmest layer in your kit.