Adjust the following guidelines to suit your microwave wattage. Microwave in 30-second increments until your desired temperature is reached (approximately 90-120 seconds total). Shake to evenly disperse heat.
To Cool:
Wrap your pack in a zip lock or plastic bag and place it in the freezer. It can be stored there for frequent use or chilled for about one hour to use as a cool pack.
WARNING:
DO NOT OVERHEAT, as this can cause burns if placed on the skin or damage the pack.