The Firstgear Heated Jacket liner is made from lightweight thermal materials to fit perfectly underneath your jacket or just worn on its own when weather permits. Connect to your bikes 12v system and heat your core up in seconds with 3 different heat levels. Combine additional heated gear such as gloves, pants and socks all controlled in sync. Lightweight polyester Micro alloy heating elements High, medium, and low heat levels Built in heat controller button Can be combined with other Firstgear heated gear such as gloves, liners and socks Connects to your bikes 12v power system Includes wire harness for easy connection to vehicle's battery Large back storage pouch