How deep will the Far Infrared Rays penetrate?
The answers I’ve heard to this particular question over the years appear to be all over the map! Everything from a few centimeters to 4.5 inches. I think the bottom line is really that far infrared penetrates deep within the living tissues of your body. If you want the numbers, then I think these are the most accurate to date: 1.5 to 2.8 inches (approx. 3.75 – 7 cm).
