The strategically placed heating use -infrared fibers to obtain the best heating performance. It can stimulate blood circulation in your feet and is suitable for people with arthritis feet, long-term cold and stiff joints Heating around the top and bottom: compared to the , which on the soles of the feet, the heating wire is wrapped around heating socks. The enough warmth for the cold feet. Used for winter outdoor sports, such as skiing, hiking, hunting, snow shoveling, fishing, cycling, cycling, etc. Practical design: the come with two batteries. To comfort, we designed the battery to be bent and lighter. Compared to other (cylindrical) battery types on the market, battery has a smaller foreign body feel and can be worn with . Perfect for outdoors: the weather in winter is wet, cold and snow-covered. When people go to work, fishing, protect , cycling or playing outdoor sports, their feet are still cold. These can solve this problem.A good as a Christmas gift or . color:Black Material:composite material Package Contents: 2 x 2 x rechargeable batteries 1 x usb cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.