Mens Battery Heated Softshell Vest Built-in heating panels made with ActionFlex™ material that provides lightweight warmth FAR infrared heating and ActionWave™ heat reflective technology to deliver hours of heat  ActionHeat™ Strategically Placed Heating Panels Use Ultra-Fine Fibers to Provide Extreme Heating Performance ActionWarmth™ Fabric Provides Maximum Insulations and Fit Estimated Heating Time: High: 135F - 3+ Hours Medium: 120F - 5+ Hours Low: 90F - 10+ Hours Includes: (1) ActionHeat™ 5V Touch-Button Vest (1) ActionHeat™ 5V Power Bank 6000mAh (1) USB Battery Charger This heated vest is designed to maintain core body temps using patented signal technology and can be used with any 5V battery. It comes with a super powerful ActionHeat™ 5V Power Bank which can power your jacket and also charge your phone, tablet, or any USB device!  (Note: Heating times will deminish if used to charge other devices.) Action Heat Men's ActionHeat 5V Battery Heated Softshell Vest