Gerbing 12V Heated Vest Liner The Gerbing Heated Clothing 12v Heated Vest Liner is a durable wind resistant liner made from nylon that boasts 5 microwire heated zones to keep you warm. This liner from Gerbing Heated Clothing is designed to be worn close to your body underneath your jacker. The liner also works as a great heated wind breaker that can be worn on its own. Note: Customers have found this vest to run a little large and recommend sizing down if you are in between sizes. Features: Ripstop nylon shell Pre-wired pant connections Max heat of 135F YKK zippers 5 Heating zones (chest, collar and back) 12v DC 4.5 amp Note: Heat controller and battery harness sold separately.