【Easily use】After opening the packaging, heated soles will heat up by themselves after a few minutes. Push down the heated soles with the smooth side down into the shoes and enjoy warmth
【Heat Duration】10 hours of heated insoles at an average temperature of 102°F. No need for electricity, boiling, or further warming of the foot warmers is necessary.
【Comfort】The ultra-thin and comfortable insoles warmers are barely noticeable and fit any shoes
【Natural material】The soles consist of iron powder, water, salt, activated carbon and vermiculite. Heated insoles are the perfect product for warm feet
【When to use】Heated soles are ideal for outdoor activities, winter sports of all kinds, winter walks. Can be kept for several years, if unopened