1,No costs
2,No electricity needed and preheating
3,Evironmental protection by using your own temperature
4,100%Safe&Clean

It is exceptionally easy to use. Simply place the hot mat on top of your mattress, or under your sheet if you prefer, so that it is placed under the area you feel the coldest. The natural warmth of your body will be retained. So you will feel warm without sweating of course.