The updated Thermite 2.0 fleece heated vest is powered by Gerbing's patented Microwire heating technology that provides best-in-class heating performance and comfort. The improved Thermite 2.0 vest provides up to 8 hours of heat and is perfect for staying warm during any cold-weather activity. We love the stylish look and comfy feel of the Thermite Heated Vest, and we know you will too!