Firstgear Gen 4 Women's Heated Pant Liner The Firstgear Heated Pant Liners were designed to provide superior heat transfer with a contoured fit. Engineered with Gelanots fabric on the front, these liners offer breathability and wind resistance. The Soft Heat Heating Panels, uniquely positioned for optimal warmth, utilize flexible carbon shaping to enhance heat distribution. Integrated heated sock connectors on the lower leg add convenience. To power both a heated jacket and pants simultaneously, an optional coaxial Y-splitter (available separately) streamlines your bike's power connection. Stay warm and comfortable on every ride with Firstgear's advanced heated pant liners. Features Form-fitting spandex fabric for optimal heat transfer and comfort Anti-bacterial, moisture wicking fabric Heat is generated over both thighs and knees and backside to warm vital areas of the body Integrated sock 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 pant liner only. Heat-troller and Y cable sold separately.