Your pets personal therapeutic device. Radiant Energy is a form of infrared energy similar to the warmth felt by sunshine with no harmful rays. The Infrared energy is absorbed by the body to a depth of 6 cm or 2.36 inches, this results in deep penetrating warmth. Traditional heating pads will only penetrate 1.3 cm or .5 inches. This form of infrared is so safe, it is used to warm newborn babies in hospitals!