Designed for all-weather enthusiasts, the Heated Core line delivers revolutionary next-to-skin warmth without added bulk. They use undetectable carbon fiber heating elements to deliver sustained heat where you need it most. The temperature of all of Heated Core's garments are controlled with the touch of a button so you can stay out longer without getting cold. A lightweight Li-ion battery provides constant, efficient heat and complete freedom of movement. Heated Core gear promises to keep you comfortably warm, no matter what activity you are enjoying.