Smart/Fast/Durable/Warm: The USB plug is compatible with most 5V mobile power supplies (not included), it can heat up quickly without radiation and start heating in 3 seconds. The red light automatically switches to a constant temperature of 35°C after 5 minutes of continuous high-temperature heating, which saves energy and prevents burns. 9 Heating Zones & 3 Temperature Settings: 9 carbon fiber heating pads are built into the front and back so you can feel the heat in 360°. Press the LED button to adjust the 3 available heating levels. The red light is used to heat up to 45°C, the white light for the medium temperature of 35°C, and the blue light for heat preservation at 25°C. Lightweight and Comfortable: The heated vest is made of lightweight thermal insulation material, which is very light, waterproof and windproof, comfortable and skin-friendly, and convenient. It can help you stay warm all winter without bulky winter clothes. Hand/Machine Wash: Can be hand washed or machine washed. Remove the power supply and close the bag before washing. Note: To protect the internal circuit, do not wring out with force, use spin drying or natural drying. Color: There are four colors to choose from. Size: L recommended [125-135 pounds] S recommended [100-110 catties] M recommended [110-125 catties] XL recommended [135-150 catties] XXL recommended [150-165 catties] XXXL recommended [165-180 catties] 1 2 3