FIR infrared ray energy is a part of the natural light spectrum of sunlight minus the skin damaging UV, which is why NASA spacecraft have utilized this heat. In Asia and Europe it has already revolutionized health and beauty products.
Far Infrared ray is a form of light energy from the sun. It falls within the same family of Infrared Ray in the light spectrum. But due to its longer wavelengths, FIR cannot be seen by human eyes, just like the Ultraviolet Rays. The energy is absolutely ESSENTIAL & BENEFICIAL for human beings and all living things in the world.