This streamlined, midweight thermal layer has an incredibly speedy moisture wicking ability and dries ultra fast if it gets wet. Made of Sherpa Adventure Gear's own state-of-the-art Dry Zone fabric, its fuzzy polyester interior draws moisture away from your body while the smooth-faced nylon exterior disperses moisture and stands up to abrasion. Bottom line: you stay warm and dry as you move, so it makes a fantastic non-bulky layering piece for hiking, biking, and running.