Firstgear Gen 4 Women's Heated Jacket Liner The Firstgear Gen 4 Heated Jacket Liner is form fitting for optimum heat transfer to your body. This jacket liner is constructed with breathable and moisture wicking fabric and features stretch side and back panels. Delivering more heat in more places than any other garment, the seven flexible carbon heat panels cover the chest, lower front arms, collar, and upper and lower back. Heated glove connectors on wrists are built in. Features Form-fitting spandex fabric for optimal heat transfer and comfort Anti-bacterial, moisture wicking fabric Lightweight, non-coated shell with fleece inner collar Heat is generated over chest, upper and lower back, sleeve, and collar to warm vital areas of the body Integrated glove plugs stow in their own zipped pockets when not in use Dual zone heating: may be used with either a Single or Dual Heat-troller Powered by DC power source Note: Heated jacket liner only. Heat-troller sold separately.