Yes, Absolutely Safe! Far infrared heat is a form of radiant energy. The sun is an example of the principle source of infrared radiant energy that we experience on a daily basis. All human bodies absorb, as well as emit, infrared radiant energy.
Infrared Sauna heat emitters produce a specific bandwidth of radiant energy that matches the vibrational frequency of the human body. This process is also known as resonant absorption. No harmful UV rays are emitted.