The infrared sauna causes the body to perspire at an optimum rate for weight loss. As the body works to cool itself, there is a substantial increase in heart rate and metabolic rate. Regular use of a Sauna imparts a stress on the cardiovascular system as well. With regular use of the Infrared sauna it may be as effective as a means of cardiovascular conditioning and burning of calories, as regular exercise. Sauna Spa's Saunas infrared heat therapy raises the core body temperature causing a passive cardiovascular workout. Below is list of other exercises. Compare and be astonished.

Burns up to 600 & more calories in just one 30-minute session. Here are how many calories a 150-pound person normally burns up in 30 minutes of exercise

Some weight loss authorities believe that our bodies use fat to dilute toxins. An Infrared Sauna is an unsurpassed expeller of toxins, it is also a great way to get rid of any fat our bodies are using to dilute toxins we are storing.

It produces metabolic weight loss

Reports conclude that although weight may drop by as much as four pounds during a long session, you are primarily losing fluids and not burning fat. This weight will return as soon as you drink fluids.
However, to produce one gram of sweat requires 0.568Kcal. Thus, reports state a conditioned person can easily lose 500 grams of sweat in an Infrared sauna, consuming nearly 300Kcal (equivalent to a 2-3 mile run). So in short the weight of the water will be regained easily by drinking, the calories will not.