Far-infrared energy heating jacket warm jackets,warm vest 1.3 pieces of ... heating pads. 2.7.4V/4400 mAh intelligent Far-infrared energy heating jacket. warm jackets,Thermal Heating vests,Warm vest (HJ ... hours In addition to heating, the FIR energy has also therapy function. By absorbing the energy eradiated by Far Infrared Ray, it ...