Features: 1.Rechargeable Foot Warmer: This is a portable and rechargeable heated insole. The rechargeable battery is built into the bottom of the insole. Comes with a USB cable for charging via a power bank or mobile phone adapter. 2.High Quality Insole: The heated insole has a soft fleece surface which is softer and more comfortable than other insoles for the touch and wear of your feet. Keeps your feet warm all winter. 3.Keeping Your Safe: This product has a stable and safe heating function. The heated insoles are washable and should also be made sure they are dry before use. Suitable for all types of shoes. 4.Scope of Application: Ideal for outdoor activities skiing hiking fishing cycling and to prevent your feet from getting cold. Combat the cold in the home riding outdoors or working in the cold outdoors. 5.After-sales Service: If you have any problem please contact us immediately we will help you solve it as soon as possible. Specifications: Upper Material: Super Soft Fleece Sole Material: EVA Temperature: 40-50 degrees (depending on the environment) Voltage: 5V/2A Product Weight: 0.13kg Suitable Size: 35-46 Notice: 1.Actual color may be slightly different from the image due to light effect. 2.Please allow 1-3cm deviation due to manual measurement. includes: 1 Pair * Heated Insole 1 * USB Cable "