Features11. Men's/women's heating vests, heating vests are made of polar fleece, soft, light, quick-drying and easy to clean. This is the best choice for keeping warm in winter. Lightweight and comfortable vest, built-in heating system, can keep you warm anywhere. 22. With 5 heating zones and 3 heating levels, the heating vest uses 5 high-performance carbon fiber heating plates, which are safe and harmless, with high heating efficiency and stable performance. It can continuously generate heat in 5 central body areas on the left and right waist, left and right sides and mid back, helping to keep the body warm and promote blood circulation, reduce discomfort and muscle tension. 33. Directly connect to the mobile power supply to charge the vest, make sure to use the 5V mobile power supply, you can feel warm in just a few seconds, and the heat generation can be adjusted. 44. Machine washable, waterproof, safe to use. products can keep you warm in the cold winter. 55. Ideal gift ideas, suitable for family members, friends, employees, very suitable for outdoor activities, such as motorcycle riding, hiking, camping, skiing, fishing, office, etc.SpecificationName: USB smart heating clothesProduct fabric: Polar fleeceUse range: about -5 Degree to 40 Degree5 heating areas: 1*back, 2*abdomen, 2*waistThree-level temperature: high temperature 65, mid-range 55, low-gear 45Rated power: 9WCharging: USB charging (powered by mobile power bank)Fever time: about 8 hoursPackage List1*heating vest