Square Aqua Pearls HotCold Pack

Heat or cool, and apply to sore muscles to ease tension. For heat, just microwave for 30 seconds, and the pack will stay warm for up to 90 minutes. Product will be very hot after microwaving, use caution. Some bubbling may occur inside plastic from condensation. For cold, store in freezer until frozen, and the pack will stay cold for up to 3 hours.