evo.com | Hestra Glove Liners > Built with three heat stages, integrated heating loops, and a USB charger, the Hestra Heated Glove Liners are the essential setup to take your hand's heat up a few notches. On top of their electric heating system, these liners were built with water and wind-proof materials and insulated with fiberfill. So even when they're not turned on, they are protecting your hands from the chill. We ask you with honesty, what could be better? Windproof, Waterproof and Breathable Ripstop / Polyamide Fabric Fiberfill Insulation An insulating material made from polyester fiber. Rechargable / Replacable Batteries Integrated Heating Loops USB Charger | Hestra Heated Glove Liners 2025 - 6 in Black | Polyester