The cornerstone piece in a heated ensemble, the Firstgear® Heated Jacket Liner is constructed of woven polyester with stretch side torso panels to ensure a close, comfortable fit that hugs the body for efficient heat transfer and allows full freedom-of-movement on the machine. The actively heated collar, with its brushed polyester interior, feels terrific against the skin. In addition to the heated collar, heating panels cover the arms, front chest and back for all-around warmth at whatever level you choose to dial-in. The liner is also built to be temperature neutral to allow wearing when active heating isn't necessary. The liner features integrated wiring connections for gloves and packs into its own zippered pouch. 106-Watt output. 7.7-Amp draw at 13.8V. Windproof. One-year manufacturer's warranty.