The North Face Men's Thermoball Full Zip Jacket\ DESCRIPTION: U pdated for 2014 with streamlined baffles contoured to fit your body, our PrimaLoft ThermoBall jacket offers ultralight, highly compressible synthetic insulation to keep you warm in a variety of winter conditions. Our new insulation technology features round ThermoBall clusters that trap and retain heat to achieve phenomenal warmth in cold, wet weather. Wear or pack this ultralight jacket for reliable thermal insulation while winter