What is an infrared sauna? (diff b/t reg and IR sauna)

What are the benefits of using a Far Infrared Sauna?

Temperature?

How should i prepare to use the IR Sauna?

Before, during, and after the sauna?

How often should i use the sauna, for how long?

Pairing sauna? (Float, acupuncture, massage)

Detoxification?

Pain Relief?

Immune system boost?

Cardiovascular system?

Weight Loss?

Who should not use the IR Sauna?