Dri-Z-Air® De-Humidifier Dri-Z-Air™ will help remove moisture from the interior of your RV, boat, or closet during periods of storage and lay-up. Protects against damage caused by moisture. Easy to use. Odorless, non-flammable. Upper compartment holds crystals that trap moisture, lower bowl holds water drawn from air by crystals. 13-oz. capacity. One 13-oz. bag of refill Crystals included. Unit is refillable. Features: Draws moisture from the air Air circulates around the entire unit