FIR has the function or radiation or irradiation and it can penetrate organizations under skin (3-5cm), muscle, bone and entrails resulting in calefaction and heat moxibustion. The Infrared Heating Waist Belt has remarkable treating effect on rheumatism, breast ache and osseous hyperplasia.
The Svelte Sauna Belt, a infrared heating waist belt, applies Fir that can penetrate easily into the tissues deeply under the skin. The wave will cause the vibration and resonance of the molecule and atoms inside the body cells, raise the temperature of the tissues under skin, expand the blood vessel gradually and accelerate blood flow. Thus , the unwanted fat will be decomposed into water, CO₂ and inorganic salt etc. by the vibration caused by FIR wave and then be excreted along with sweat from the expanded pores on the skin.