Compressed in cold: can be used in 60 minutes or in low temperature refrigerators (-18 C a-20 C), or can also be used in the refrigerator for emergency use. This sleeping bag is only suitable for external use. If the package is unintentionally damaged, the internal liquid may be contaminated by the eyes or skin. Rinse with water. To prevent the temperature from being too high or too low, it is best to use a towel or cotton cloth. If you feel uncomfortable after applying, you should apply for a period of time before applying. If the user's circulatory system is defective, please consult a doctor first. The time of each cold compress should not be too long, 15 to 20 minutes. Features: 1. Modern medicine is incregly advocating cold compression therapy, in which cold compression can cool the surface of the body, causing blood vessels to strain and reducing the release of painful substances. 2. The product consists of high-density compounds and various biological elements, which are to the human body without any side effects. The scientific formula makes the bag flexible and maintains a soft hand. When stored in a long time environment below 18 C, it is often called "ice bag thawing." 3. When using this product, it can make treatment more effective depending on the part of the application, close to the joints and muscles. 4. The product is used after preheating or preheating to accommodate unrestricted heat and cold replacement. 5. Applicable to:Cold compress: Effectively relieve headache, fever, trauma, hemostasis, fever, toothache, mild burns, sprains, fatigue, etc. 6. Cold compress: Put the hot and cold bag in the freezer of the refrigerator for 30 minutes, or take it out for more than 1 hour. 7. Hot compress: Put this pro3.When using this product, it can make treatment more effective depending on the part of the application, close to the joints and muscles. 4.The product is used after preheating or preheating to accommodate unrestricted heat and cold replacement. 2.The product consists of high-density compounds and various biological elements, which are to the human body without any side effects. The scientific formula makes the bag flexible and maintains a soft hand. When stored in a long time environme. 1.Modern medicine is incregly advocating cold compression therapy, in which cold compression can cool the surface of the body, causing blood vessels to strain and reducing the release of painful substances. 6.Cold compress: Effectively relieve headache, fever, trauma, hemostasis, fever, toothache, mild burns, sprains, fatigue, etc.