For soothing warmth, heat the Calmer in the microwave (800-1000 watts) for 60 seconds inside the Terra Tote. To keep your warmable safe and snuggly, do not heat without the Terra Tote. If your Calmer is not as warm as you’d like, you can reheat it in 30 second intervals. For even heat distribution, rotate the Terra Tote 180º between each reheat and check if any part’s temperature is too high. After heating, the warmth will last up to 1 hour.