This product keeps warm and relieves rheumatism and colds. The crowd provides cold and warm care for the common cold, women's menstrual period, and middle-aged human rheumatism and joint pain. It is suitable for heatstroke prevention and cooling in outdoor sports such as field work, mountain camping, polar adventure, winter travel, skiing, fishing, etc. It is in your pocket. It heats up quickly in a few minutes, averaging 53 degrees Celsius with a high of 65 degrees Celsius, and cooling to outside temperature in about an hour. The product should be placed outside the underwear, not directly on the skin. Beware of low temperature burns. If the body is heated for a long time, symptoms such as erythema and blisters may appear. The maximum heating temperature is 66. Do not use it when sleeping at night for children, disabled people or sensitive skin, and pay more attention to use when there is a low temperature burn. Note: Do not apply directly to human skin, but apply heat or compression to the outer layer of clothing where needed. all Products From Us Have Undergone Strict Quality Checks. if There Is Any Quality Problem Or You Are Not Satisfied With The Product contact Us. we Will Give You The Best Solution.