Feature: 1. Electric heating, wear resistance. Adopts super soft velvet, which is exquisite, soft, comfortable to wear. 2. Widely used, suitable for leather shoes, athletic shoes, snow boots, cotton slippers and any other footwear. 3. There are 3 heating modes: USB interface, power adapter, portable power supply. 4. Carbon fiber power generation, high temperature resistant materials, energy saving, can be customized. 5. Washable and reusable: The heating material is waterproof and washable but should be completely dry before use. Specification: Condition: 100% Brand New Item Type: Heating Insoles Material: EVA Polyester Color: As Pictures Shown Size: 37-38 Product Size: Approx. 24cm/9.4in Weight: Approx. 84g/3oz Quantity: 1 Pair Applicable Gender: Neutral/Male or FemaleVoltage: 5-6V Power Supply: USB Port . Package List: 1 Pair x Heating Insole Note: 1. When not in use, please unplug the power in time to avoid prolonged heating.2. The elderly and children need to use it under supervision. 3. In order to protect the heating chip, it is strictly prohibited to wear the heating insole and do strenuous exercise 4. The products are numerous, different models of the electrical parameters of the products are different, do not randomly match between accessories! To prevent accidents.5. Manual measurement, please allow 1‑2cm error, thank you!6. The picture may not reflect the actual color of the project due to the differences between different displays.