Game changer! Pun intended. We've combined lightweight, abrasion resistant nylon with conductive thread heating elements and built the perfect heated vest for game day. This officially licensed Denver Bronco's heated vest provides up to 10 hours of battery-powered warmth! Take control of your heat with the three heat levels, easily adjusted with a simple touch of the button.  Our ultra compact 6500 mAh 7.4V battery supplies 3x the juice of other competitors and has a USB port for easy mobile charging. Supporting your team has never been easier.