Energy saving & environmental protection: Adopts far infrared carbon fiber with uniform heating, high heat conversion rate, fast heating, soft and comfortable. Equipped with carbon fiber heating material, low power consumption, energy saving and environmental protection. For All Kinds Of Shoes: Suitable for different kinds of shoes that meet different needs. Heated soles can be inserted into existing shoes for use and do not affect their beauty or comfort. Waterproof design: Waterproof and washable reusable, heating can be done with a power bank, is convenient. You can also clean with a brush (not machine washable). Must be completely dry before use. Easy to Carry: Two feet separation design, flexible and convenient to use, suitable for a wide variety of people. Old people and children must use it under supervisionAreas of application: Heated soles are ideal for outdoor activities, winter sports of all kinds, winter walks as well as for visits to the stadium and the Christmas market.This insole has three gears, the temperature is 40-50 degrees Celsius Package Included: A pair of insoles A USB charging cable A thermostat "all Products From Us Have Undergone Strict Quality Checks. if There Is Any Quality Problem Or You Are Not Satisfied With The Product contact Us. we Will Give You The Best Solution."