[High quality material] Heated insoles adopt new heating technology. They feature soft and comfortable EVA stretch material, lightweight, elastic and with good cushioning. Keep your feet warm in winter for optimal blood circulation in the feet. the temperature reaches up to 108 / 42C. [Cuttable Size] The electric insoles can be cut to the size you need, adjustable to your shoe size, the size range of shoes is marked on the insoles for your DIY convenience, the heated insoles are 5mm thick, you don't need to worry about the size, there are lines marked on the insoles, easy to cut. suitable for men and women from size 8-11/41-45. [USB heated insole] Large heating surface, even heat distribution. The heater is comfortable with the interface. The heated insole is used for heating via the USB cable. so no matter where you go, you can keep your feet warm. [Cleanable and reproducible] This insole material has a waterproof effect, is washable and reusable, you can wash it by brush, not for machine washing, it should be noted that it should be dried after washing and should be completely dried before use. [Wide range of uses best gift] Perfect for outdoor activities air skiing, hiking, fishing, cycling, hunting to prevent your feet from cold. Against the cold in the house, cycling outdoors or working in the cold outside. is the best Christmas gift.