JSB HF90 Foldable Tourmaline Hot Stone Detoxification & Slimming Belt with 205 stones for Wide Coverage is a natural alternative therapy product for healing and promoting slimming. Tourmaline stone when heated emits Far Infrared Rays which help in boosting immune system, Promote Detoxification Naturally, Improves the Digestive system and Boosts the Weight Loss Process. JSB HF90 Tourmaline Hot Stone Detox Slimming Belt is a multi-functional hot stone belt working on the principle of hot stone thermal therapy. The Thermal Heating mattress is very effective to combat cold weather and specifically advised for old people and arthritis patients. Tourmaline emits far infrared rays. Electromagnetic radiation in the far infrared range is able to boost the immune system and promote detoxification.Tourmaline emits far infrared rays and produces the best effects when your body is in close proximity. It is one of only a handful of minerals that have the ability to emit negative ions and far-infrared rays. The word tourmaline takes its origins from the Singhalese phrase "tura mali," meaning "stone mixed with vibrant colors."