Don't let the cold weather stop you from hitting the roads. Our NB RADIANT HEAT Vest features metallic woven fabric inspired by mylar marathon blankets. Infused with a unique plasma process, this fabric lines the chest and collar to deliver superior warmth retention by refelcting your body's heat back to you. PrimaLoft® ThermoPlume® insulation with Cross Core™ helps shield you with bonded baffles and wind and water-resistant outer fabric through the front body. Secure hand pockets allow you to safely store your belongings, while reflective details won't go unnoticed, making this the ultimate winter running vest.