Principle: Heat Sauna Blanket with Infrared Heating Therapy-Using the unique penetrating power of the body, it can absorb far infrared rays. When these rays penetrate the skin, the deep thermal effects of the subcutaneous tissue cause blood vessels and capillaries to dilate, thus promoting better blood circulation and helping to get rid of body toxins and metabolic waste. Environmental Material: The second generation environmental protection Oxford cloth material, inside are waterproof PVC with flexible tensile capabilities even in various sleeping position, temperature adjustable from 77? to 176?, time setting from 15 to 60 min., infrared dry heating, 2 zone-temperature control. Multi-Function: This deeply relaxing treatment is also great for stress relief score joints and stiff muscles you will leave invigorated renewed if you are looking for instant detox pain relief or you just want to drop a dress size. Recovering therapy for shoulder, hip and waist, back and legs. Use Tips: To avoid the blankets from sticking together, you have to smooth out the blanket when it is heating, do not fold the blanket until it cools, and do not set the temperature too high or turn it on for a long time. Safety Tips: Please don't put it in a place like sofa or bed to store heat; Pregnant women, hypertension more than 180, severe heart disease and other major diseases are strictly prohibited. Suggestions can be worn thin cotton pajam.