Plug in and get warm with the ActionHeat Men's Slim Fit 5V Battery Heated Sweater Jacket. The ultra-soft knit material is wind-resistant and lined with heat-trapping insulation. Side bungees let you cinch tight against the cold. Battery-powered infrared panels are strategically placed to deliver active warming around your core, keeping you warm in the coldest conditions. The discrete battery bank provides consistent power and can also charge your electronic devices.