12V heated jacket liner is the perfect addition for riders wanting complete comfort, regardless of the temperature. Durable, wind-resistant nylon chassis, this liner comes with 7 Microwire™-powered heat zones in the collar (1), chest (2), sleeves (2), and back (2). Designed to be worn close to the body, under an outer jacket, or over a thin polyester base layer. Microwire™ heat zones come to full temperature in seconds. Liner also serves as "home base" for Gerbing heated gloves, pants and sock connections. Pre-wired glove connections at end of hemmed-cuff sleeves. Mini-ripstop Nylon shell with Taffeta lining. Two-Way main zipper. Peached inner collar. Snow skirt inside. Removable hood. Packable pocket. Sizing XS through 3XL, and three long sizes: M/Long, L/Long and XL/Long. Lifetime Warranty on Heating Elements. Get the most out of the liner by pairing with one of our dual-zone controllers, like the Dual Controller (Wireless Ready), or the Dual Zone Knobbed controller (sold separately). All Gerbing installations require a Battery Harness and Temperature Controller for operation (sold separately)..