This electric heating vest is unisex with 4 sizes to choose. Even in the cold winter, it is extremely hot with electric heaters! It is very active in outdoor sports and cold weather driving, motorbike driving, walking and outdoor work etc. With USB connector, mobile battery and USB power supply can be used convenient! When people go out in the cold winter, they usually need to wear a thick coat and become very fat. However, with our super lightweight warm vest, you can go out with less clothes. The heated pads can also help promote blood circulation, relief pain of muscles. Best Christmas gift for parents and families.