Does the mat produce negative ions when it is not plugged in? If so, how does it compare to when it is plugged in?

All Ereada® mats generate negative ions from amethyst, tourmaline, and other gemstones, as well as from special anion layers built inside the mat.

Crystals naturally release ions, and when they are warmed, ion output increases. With heat (or even from body warmth when the mat is unplugged), the crystals and ion layers may produce approximately 500–1500 ions per cubic centimeter near the surface. Without anyone on the mat, emission may be closer to 200–300 ions per cubic centimeter.

Most ion meters on the market are designed to measure air-cleaning ion generators. Those devices create very concentrated ion streams in one small point so dust can be captured, and ions then disperse into the room air. In that case, ions primarily enter the body through breathing.

With Ereada® mats, ions are not only released into the air — they are also conducted directly through the surface while you are lying on the mat, which allows closer interaction across a larger contact area.

If your mat includes a NEGATIVE ION or N.P. button, it means it has an additional electrostatic negative-potential function. This feature creates a gently charged negative field through a special silver-fiber layer, surrounding the mat with a high-potential electrostatic environment while the feature is active.