Wear these heated glove liners under your existing gloves to keep your hands warm. Connect directly to the 12V battery in your motorcycle, snowmobile, or ATV for non-stop heat. Add a portable battery pack to keep the heat going when you're not on a powersport vehicle. Warmth and Comfort: Leverages ZEPTO® fiber technology; made in France, these heating fibers are so thin you wouldn't be able to notice them if not for their tremendous heat output. Heats the entire length of each finger and thumb. Engineered to pair seamlessly with Gears Canada's Gen-X3/X4 Heated Jacket Liner or Gen-X3/X4 Heated Vest Liner.