Warm up without feeling weighed down, our proprietary LifaLoftâ„¢ insulation is lighter and warmer than standard insulation. The Kensington Winter Jacket features both the LifaLoftâ„¢ technology and Black Eco Insulation from Primaloft for when you need to stay warm for long hours in cold conditions. The Helly Tech Professional membrane allows the jacket to stay waterproof & breathable, with articulated sleeves, detachable hood and adjustments on the cuffs to create the perfect fit.