TheraSauna® uses proprietary, high glass-content, solid-ceramic TheraMitters™ at the proper watt/density for deep body penetration to induce profuse sweating and thereby detoxifying the human body. Solid ceramic heaters have a 96% radiant efficiency rating. Therasauna full spectrum far infrared saunas are made in the U.S.A. with the patented control system that allows for complete control and the ability to consistently reach the desired far-infrared micron level of 9.4.