The great advantage of this product over all other electrically powered products is that the heat disappears gradually, which has a very positive effect on the results of heat therapy. Normally, the warming effect lasts between 25 and 30 minutes, but if you use it in bed, the warmth can even last all night! If you use it cold, after putting it in the freezer for a few hours, you can use it for at least 15 to 20 minutes. You can put your hands in them unprotected because there are no problems with cold burns thanks to the high-quality cotton they are made of.