FogIt's unique formula uses a chemical reaction to create a “fog” inside vehicles that attacks and destroys offending odors. What makes the FogIt™ A-200PRO Kit unique is that it is not a masking agent. The product does not “cover up” the odors with other scents or smells—you won’t find “Spring Air” or other scents to choose from. FogIt™ simply treats the source of the odor in vehicles and permanently removes the cause…“FogIt and Forget It!”