This refillable room freshener is a nonelectric moisture absorber to protect against damage caused by excess moisture. This refillable room freshener absorbs musty odors caused by stagnant air which creates fresher, healthier air. It is unscented, nontoxic, septic safe, and friendly to the environment. 10.5 oz. Refer to model No. FG30K for 42 oz. refill. Damp Rid.