SMART CARECold & Hot PackCold compress:Store in the freezer about 1-2 hours to freeze the gel.Hot compress:Put the pack into the microwave oven for about 2 minute with intermediate fire. Limit treatments to 20 minutes at time.Hot water: boil the pack in the hot water about 4-10 minutes. And please check every 1 minute to reach ideal temperature. Notice:If the temperature is too low or high for you, please use acloth wraps to cover the pack.HOT THERAPYRelieve short-term muscle and joint pain, back strains andmenstrual pain. COLD THERAPYRelieve injury swelling, minor burns, headache and toothache.Ton-toxic, Latex Free, No peculiar smell, Environmentallyfriendly, Reusable.SMART CARECold & Hot PackCold compress:Store in the freezer about 1-2 hours to freeze the gel.Hot compress:Put the pack into the microwave oven for about 2 minute with intermediate fire. Limit treatments to 20 minutes at time.Hot water: boil the pack in the hot water about 4-10 minutes. And please check every 1 minute to reach ideal temperature. Notice:If the temperature is too low or high for you, please use acloth wraps to cover the pack.HOT THERAPYRelieve short-term muscle and joint pain, back strains andmenstrual pain. COLD THERAPYRelieve injury swelling, minor burns, headache and toothache.Ton-toxic, Latex Free, No peculiar smell, Environmentallyfriendly, Reusable.