I am disappointed by this article. I just got it, and after the first time, I realized that this heater heats little, and really not long at all. Now with the postage, I paid almost as expensive as if I had to buy my heater in a large sports teaches that I will not mention. Home, heaters and longer really hot (I tested last weekend). So I'll have to go buy another home. One last point also: that is called as "hot pack" and because of the picture, I thought I had bought a lot of two heaters. But it is only one heater! In short, a fun toy, but no other interest. So for me, it's just the wasted money ...