Keep your core warm, even on brisk, windy days with the Gerbing 7V Battery Heated Vest Liner. Designed to serve as an insulating layer beneath a vest or jacket, this heated liner utilizes 4 innovative, built-in heating panels to keep your core body temperature warm and comfortable in frigid environments. Operating on a removable and rechargeable 7V battery with an LED power indicator, this liner boasts long-lasting warmth, while remaining 100% machine washable! Machine wash. Imported. Manufacturer style #: GER-VL. 100% nylon exterior 100% polyester interior Powerful Tri-Zone heating system Touch-button control technology LED power indicators Full-zip front Lithium-Ion polymer battery