The Men's Viloft Thermal Long Sleeve Baselayer Top is the ideal layer to add insulation to your next outdoor adventure. Whether you're sitting next to the campfire after a hard day of hiking, or getting ready to hop into your sleeping bag for the night, this unique blend of Polyester, Spandex and Viloft will keep you warm and protected from the elements. The lightweight feel and soft texture provides an unmatched level of comfort. A raglan sleeve offers added mobility, while the next-to-skin fit gives it a performance feel.