Oust® Air Sanitizer is scientifically formulated to kill odor-causing bacteria in the air. It eliminates odors without just masking them. When you spray Oust® Air Sanitizer to counter unpleasant smells from pets, smoke, mold, mildew, dirty laundry, and the bathroom, you're not just hiding the odor temporarily with an even stronger scent, you are truly eliminating odors.