3 heating levels - This heated vest jacket has three heating levels that generate temperatures from 25 to 45 C. High temperature = red, medium temperature = blue, low temperature = white. Different temperatures can be selected as required. 11 heating zones - This heated vest contains 11 high-performance carbon fiber heating pads. It is safe and harmless with high heating power and stable performance. It can continuously generate heat in 5 central body areas of the left and right waist, left and right flanks, and middle back, keeping the body warm and promoting blood circulation, relieving pain and muscle tension Machine washable - The heated vest is made of fleece, is soft, light, quick-drying and easy to wash. is comfortable to wear and can be washed by hand and machine (note: put in a laundry bag). Wrinkle and abrasion resistant, warm and easy to clean. Skin-friendly materials just make you feel comfortable and happy. It's the best option to keep warm in winter. NOTE: The power supply is not included.