Humidor Solution offers you the ability to know your cigars are getting just the right humidity they need to stay fresh. This amazing process is a result of the hygroscopic properties of the Polypropylene Glycol and pure water Solution. The Propylene Glycol will force moisture, in the form of humidity, into the atmosphere until 70% humidity is achieved. If the humidity is above 70%, the solution will remove moisture from the air until the relative humidity has stabilized. Brigham Humidor Solution offers you the peace of mind to know your cigars are getting just the right amount of humidity. this propylene glycol will regulate your humidors humidity to a perfect 70%. Anti-fungal and ready to use!