•Soak the dry ice packs in water for at least 15minutes (Soak it longer for the ice packs to expand to it's maximum size)
•After a few minutes, the material in the ice pack will turn gel-like.
•Dry the surface of the ice packs before having them freezed
•The cooling effect can be sustained for about 3-72 hours depending on the surrounding temperature.Recommended to use with ice pack insulation foam box / bagto achieve a longer term cold storage effect
•After completely defrosting, the contents will return to gel-like. To re-use, easily have them freezed again