遠紅外線 Far infrared RAY
Far-infrared rays generally refer to light waves in the region of 15 to 1000 μm in the spectrum, which belong to the wavelength range of infrared rays. It is located outside the visible light spectrum and is invisible light. Far infrared rays in the range of 4 to 14μm resonate with the molecules of the human body, which can promote the expansion of microvessels, smooth blood circulation, promote metabolism, and then increase the body's immunity. Therefore, this far infrared rays are also called "light of fertility".