Let’s face it. Those disposable handwarmers at the gas station are useless. So, we took the bestselling 509 Backcountry Glove and added heat. Push a button and the 509 Backcountry Ignite Gloves warm your hands with up to five hours of heat. The compact and rechargeable 7.4-volt lithium-ion battery pack powers carbon heating elements on the back of your hand and thumb with three settings so you can dial in your comfort to match the conditions.