Infrared rays are the healthiest of the sun's ray's, they penetrate into your skin deeply and they dissolve harmful substances accumulated in your body. The infrared rays vitalize your cells and metabolism. Too much sunlight damages the skin. Infrared heat provides all the healthy benefits of natural sunlight without any of the dangerous effects of solar radiation. Far infrared waves penetrate into our body to activate the sweat glands. The sweat glands offer one of only a few mechanisms that the body has to eliminate toxins and since the skin is the largest organ in the human body it is apparently a very good means for elimination.