Material: EVA.Electric heated shoe insoles battery warmer ski boot foot heater.Keep your feet warm. With intelligent thermostat.Breathable deodorant, free cutting.With durable performance.Specification:Color: BlackMaterial: EVAPower: 8WPower: 5V/2ASize: 35-39/40-46 code Package list:1 Double * heating insole1* Charging lineNotes: 1. Only sell main products, not other products.2. Since manual measurement is required, please leave a space of 1-3 cm.3. Due to screen differences, the color may be slightly different from your expected color, please allow.4. This product can be washed with water, remember to dry and heat the insole before using it.5. The elderly and children need to use it under supervision.Remind:After receiving the packaging, please check the packaging and the product carefully. If the received item is defective or has any questions, please contact us via email to resolve the problem. We will reply as soon as possible and do our best to meet your needs!