What is the Negative Ion level per cc?

Ions generated by our mats come either from special anion fabric layers inside the mat or from tourmaline and amethyst crystals. The output is not so large, but it is on a healthy level 500-1500 cc, and these anions are conducted directly into the body through the skin, not only through breathing. So it is much more efficient and safe, and completely ozone-free. 

When the mat is heated by electricity or utilizing your own body heat ( when it is unpowered ), it generates ions in a pyro-electrical way. It is very natural.