This is the ultimate lightweight layer for active pursuits in cool weather. Using the most stretchable, breathable, quick-drying synthetic insulation we've ever created, the UL Thermawrap series is purpose built to reduce layer shedding stops on the trail so you can focus on the moves, the turns and what's over the horizon. Features an athletic fit. We blend several types of polyester fibers together to create an insulation which possesses outstanding warmth retention, durability and the ability to stretch.
Since it is resistant to moisture, even if it gets wet from rain or perspiration during physically demanding activities, it is able to maintain its loft and thus its ability to retain warmth. This property also makes it quick to dry.