The AirMini HumidX is a waterless humidifier for the AirMini CPAP machine to be used in standard sleeping environments. The AirMini Humidx works by using the heat and moisture from your own breathing and stores it within the tiny paper ridges. When you inhale, the heat and moisture created from exhalation is released into the air you breathe adding humidification. Leave your distilled water at home and still enjoy the benefits of humidification!