The good preservation of cigars in a cellar requires a permanent humidity and at a constant rate of about 70%. It is not always easy to fulfill these conditions, but this product can provide substantial help. These are crystals for humidifier of cigar cellar. By humidifying them with distilled water or demineralised water, and with an initial transitory period of 48 hours, they can ensure the preservation of cigars under ideal conditions. Once the crystals have dried out, it is enough to re-moisten them to find their property. It is therefore important to monitor them regularly.