Black, L No batteries or external power source required. You are the heat source! With its revolutionary air chamber technology, the Firstgear Heat Pump Vest provides passive heat retention that's totally customizable via the included Heat Pump actuator. The smooth outerskin of this vest allows you to easily layer any outerwear on top, providing warmth when you need it on or off the bike. Poly/bamboo inner lining wicks moisture, dries quickly and minimizes odor retention.
Two-way front zipper
Dual, zipper-secured hand warmer pockets
No batteries or external power source required; you are the heat source
Two-year limited manufacturer's warranty