Beat back the cold weather with the Hotwired Heated Jacket Liner. The key to staying warm is keeping your bodies' core warm and with 6 heating zones throughout the liner. Carbon fiber heating elements have been woven into 6 key areas on your chest, back, sleeve and collar and feature three different temperatures settings. The Hotwired Heated Jacket Liner allows you to change your heat settings on the fly with an integrated smart soft touch controller built into the jacket.; Lightweight nylon shell Carbon fiber elements 6 heating zones Integrated smart soft touch temperature controller Pairs with Hotwired Heated Gloves Includes battery harness and fuse Thermal protector with automatic shut off 2 Year warranty