The Firstgear Heated Pant liner is made from lightweight polyester and nylon materials to fit perfectly underneath your riding pants. Connect to your bikes 12v system and heat up in seconds with 3 different heat levels. Combine additional heated gear such as socks, jackets and gloves all controlled in sync. Polyester/nylon Micro alloy heating elements High, medium, and low heat levels Built in heat controller button Can be combined with other Firstgear heated gear Connects to your bikes 12v power system Includes wire harness for easy connection to vehicle's battery