Precautions for Hot Therapy Fill the bag TWO-THIRDS FULL with warm water Do not place the pack in a microwave oven to heat the water; To prevent burns: A. DO NOT fill with water extend B. Let the bag sit for at least 5 minutes before use; C. Always place a towel between the hot pack and your skin; D. Do not fall asleep with the hot pack on your skin; E. Do not use the hot pack on the same part for longer than 15 minutes; (If needed the packs may be used multiple times a day) Precautions for Cold Therapy Do not place the cold pack in the freezer; Fill the ice bag TWO-THIRDS FULL with either cold tap water ice water crushed ice or ice cubes; To prevent frostbite: A. Let the bag sit for at least 5 minutes before use; B. Always place a towel between the cold pack and your skin; C. Do not fall asleep with the cold pack on your skin; D. Do not use the cold pack on the same part for longer than 20 minutes; (If needed the packs may be used multiple times a day)