1. The innovative U-shaped design fits the curve of the shoulders and neck of the human body, and is suitable for necks of different thicknesses. 2. When working, release the pressure, put it on the waist, and sit upright, which can effectively alleviate the problem of soreness. During the lunch break, to relieve fatigue and relax, it can be placed on the shoulders and neck to relieve fatigue, and enjoy the relaxing time of the afternoon nap. During menstruation, it warms the abdomen and can be placed on the abdomen to drive away abdominal pain and make those days more comfortable. When the seasons change, relieve pain, can be applied to the knee to relieve pain and care for joint health problems 3.3 minutes of quick heating, enjoy the comfort of a hot towel, use high and low temperature resistant -20C-100 silica gel, pour cold water into the microwave and heat for three minutes, it can be kept warm for 2-3 hours. It cannot be heated in the light wave mode, the holding time varies with the ambient temperature, and the time is only for reference. 4. A special air duct is set up to keep the air pressure inside and outside the balance. When pouring in hot water, prevent water splashing. 5. It can be used both hot and cold. It can be refrigerated and turned into an ice pack. Fill it with water and put it in the refrigerator to refrigerate. Physical cooling | Cold compress for sprains | Relieve swelling.