DescriptionDo you want to buy a set of professional but affordable USB rechargeableshoe insole? Our product can meet your requirement. The right tool tokeep your feet warm and comfortable. Stable heating, guaranteed safety,perfect for meeting your different needs.Features- Color: Black - Material: EVA stretch fiber, far infrared carbon fiber, USB cable- Size (35-39): 25.00X8.50X0.50cm/9.82X3.34X0.20inch. - Size (40-44): 27.00X9.50X0.50cm/10.61X3.73X0.20inch. - This electric USB foot warmer is compatible with USB interface. The color is black, stain-resistant and durable - Put the soles in your shoes and plug them in to enjoy the warmth.- Stable heating, guaranteed safety, perfect for meeting your different needs. - If there is moisture in shoes, you can also use the heated sole for internal auxiliary drying. - Washable and more convenient to use. Our product for all types of shoes.