F-Matic high performance gel air fresheners work 24 hours a day for 30 worry-free days, neutralizing odors, not just masking them. F-Matic high performance gel air fresheners are a natural product containing organic ingredients, botanical fragrances and the essential oils of fruits, flowers and exotic plants. This is odor control that creates a positive first impression in any establishment. And with our patented pop and twist removable seal, these gel air fresheners make it easier on you than any others to change out, saving you time and money. Our high performance gel air fresheners work with the flex air freshener dispenser to cover 3,000 cubic feet.