How Far Infrared Technology Works ,You can watch on youtube

Infrared light is a product of heat production. Humans generate waves in the 6-20 micron range. The optimal output range of far infrared sauna emitters is between 5 and 14 microns which is very close to the resonant frequency of a water molecule. This similarity makes sense since our bodies are almost 70% water. This range, sometimes called "Vital Rays", appears to have special regenerative effects on the body. Our heater's output is evenly spread around the 9.4 micron point of peak human output. Because the water molecule resonates or vibrates, this vibration causes a release of cellular toxins such as mercury, aluminum, cholesterol and other toxic gases such as sulfur and formaldehyde. The energy output from the far infrared sauna corresponds so closely to the body's radiant energy that our bodies absorb 96% of the energy.