How long does it take to freeze or heat up?

For cold therapy, store in the freezer or refrigerator depending on your comfort level. It'll typically take 2 hours to reach the ideal 'frozen' temperature. We recommend leaving it in the freezer/fridge so it's ready to use when needed. For hot therapy, place it in the microwave at room temperature for as little as 20 seconds and TheraICE is ready to help you slip into deep relaxation.