Plug in and get warm with the ActionHeat Women's 5 V Battery Heated Base Layer Shirt. The stretchy polyester and elastic fabric moves with your body and fits snugly for easy layering. 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. ActionHeat Women's 5 V Battery Heated Base Layer Shirt Black, Medium - Men's Thermals at Academy Sports