Dri-Z-Air 13 oz. Moisture Absorber effectively removes excess moisture from the interiors of trailers and campers during storage or lay-up. It keeps your belongings like clothes, sheets, and shoes dry and prevents condensation on windows, walls, and ceilings. This odorless and nonflammable moisture absorber is easy to use and can also be used in boats, closets, storerooms, and RVs. For additional refills, use Model No 502 (SKU 602256).