[2021 upgrade heated vest] The men's and women's heated vest updated in 2021 adopts the latest carbon fiber and imported high-quality TPU heating film design, which has a fast heating speed. Built-in 5 far-infrared thermotherapy carbon fiber components, quickly warm your core body, and help promote blood circulation and relieve muscle pain.[Comes with mobile power] This heated vest for men and women is equipped with super 5V 10000mAh USB mobile power. There are 2 USB ports on the mobile power supply, so you can charge your mobile phone while using the heating suit. 2021 upgrade vest with battery pocket, easy to use. Fully charged, comfortable and warm for up to 8 hours at low temperatures.[3 adjustable temperature] With 3 adjustable temperature, easy operation, LED indicator design, can adjust the appropriate temperature according to the weather change and different environment. Change the temperature with the click of a button, switch between three heating Settings (high, medium, and low), and hold down for three seconds to turn the power on and off.