Far Infrared has the unique ability to warm the body without the need to raise air temperatures. Which means you can experience comfortable warming of the body even at low air temperatures.
Doctors patients who for example, have severe heart disease cannot tolerate the high temperatures of a conventional sauna. However Far Infrared Thermal Treatment is successfully being used to treat Chronic Heart Disease. (Shujiro Inoue , Masao Takemoto , Akiko Chishaki , Tomomi Ide 1, Mari Nishizaka ,Mami Miyazono, Hiroyuki Sawatari 2and Kenji Sunagawa – 2012)