How to use the mat during the summer, it may be too hot to sleep.
The traditional use of these crystals in Asia was to cool one down in summer and warm them in winter.
The mat can do the same. Just do not activate the heat settings in the summer, and you will feel great.
The mat will absorb excess heat from the overheated parts of your body and return it as FIR rays to those in need of more circulation and more warmth.