INFO THAT YOU NEED TO KNOW
Far-infrared ray penetrates beyond the skin level and is absorbed efficiently by cells. whereas visible light is mostly bounced off the skin surface. Near-infrared is mostly absorbed at the skin level and raises the skin temperature. Far infrared can penetrate up to 4 centimeters (about 1-1/2 inches), exciting the vibrational energy of molecules and resonating with cellular frequencies. The effect of FiR rays promote bioprocesses such as increased metabolism and blood circulation, and can raise core body temperature.