SurmountWay Sauna Blanket Detox Far Infrared, Professional Body Shaper Sauna Blanket Detox Therapy Machine(Upgrade Purple)High Quality Material: Made using high quality PU material on the outside and a waterproof PVC interior, this blanket provides both durability and optimal comfort. Operating Principle: When using the sauna blanket, the far infrared ray can penetrate the skin, the deep thermal effect of the subcutaneous tissue will cause blood vessels and capillaries to expand, thereby promoting blood circulation and accelerating the body's metabolism, expelling toxins