Infrared light is part of the Sun's invisible spectrum. One of Far-Infrared light's characteristics is the ability to easily penetrate human tissue. When this happens, it creates a natural resonance, which has many beneficial properties. Remember the last time you were sunbathing with sunscreen? Were you still hot? Of course you were because the sunscreen only stops the UV (Ultraviolet) light from hitting your skin. The Far-Infrared heat (Far-infrared light waves) penetrates your skin, giving you that wonderful natural warmth.
FAR INFRARED SAUNAS
You can be exposed to Far-Infrared heat for hours and it will never cause your skin to burn. Far-Infrared heat is completely healthy and safe for all living things. In fact, Far-infrared heat is so safe it is used in hospitals to warm newborn infants.