Rapid HeatingEven heating, high heat conversion efficiency, soft and comfortable. The Heated Insole adopts 5V/2A heating material, farinfrared carbon fiber, and the heating temperature is 4050.Keep WarmHeating Insole is designed to keep your feet warm in the lowtemperature zone without being too hot to sweat. Whether you're hiking, hunting or skiing, these insoles protect your feet from the cold winter winds.Easy to Clean and UseElectric Insoles are made of a hydrophobic material, which can be directly washed for more convenient cleaning. Just put your shoes on, plug them in, and enjoy the warmth.Size OptionalHeated Boot Insole sizes 3539 and 4044 are optional. In addition, the tailorable design is suitable for all kinds of footwear. When cutting the insole, only the upper and heel are not cut.Widely UsedBoth men and women can use it. Heated Boot Insole is perfect for skiing adventures, outdoor work, photoshoots, fishing, running, biking, hiking and more to keep you more active in some winter activities.