The XeroVest is a highly portable, inflatable, air-insulated emergency garment. Weighing only 2 oz. (57g), the vest is made up of a network of cross-connected cells which are inflated through a simple one-way mouthpiece on the vest's collar. Inflating the vest creates a warm, insulating layer of trapped air, while conforming to the shape of the wearer. This insulates the wearer's body core while allowing moist air to escape through the vest's integrated vent holes. The interior surface of the vest is mirrored and thermally reflective — keeping body heat trapped next to the user, and preventing as much as 80% to 90% of radiant heat loss.