Dual Temperature Use?Cold use by freezing gel pack in freezer for at least 2 hours or heat them up in microwave for 10 seconds for heat therapy, help to relieve outchies or boo boo. You can keep two frozen at all times and have the other one ready to be heated to be prepared for anything. Methods of Use?Put the product into freezer for more than 2 hours, or place it until the product reaches the temperature you want. To avoid frostbite, test the temperature of the product before use. Easy to Clean?Medical grade high quality double sealed PVC shell filled with soft gel that remains elastic after freezing and soft during treatment.Easy to clean with soap and water.Free to enjoy the therapeutic effect!. Reusable Gel Ice Packs?For adults, infants and children, relieves bruises, lumps, inflammation, headaches, joint pain, minor burns, toothache and itchy bites.