SUNSKY 2 Pairs USB Shoe Dryer Electric Insoles Shoe Winter Keep Warm Heated Insole for Shoes Boot 37-38

Upper material: comfortable,soft fleece

Pay attention to materials: Far infrared carbon fiber, through a special process to produce a thickness of only 0.02cm/0.01", soft sheet heating material, its heating evenly, high heat conversion rate

safe and reliable, the output voltage of the USB interface is only 5V, the output voltage of adapter is only 6V, and with voltage regulator protection device, the two output voltage is lower than the

energy-saving environmental protection. Power less than 8W, an average of 125 hours consumption of 1 kWh

practical. Insole directly placed in shoes, easy to save. Feet separation, flexible and convenient