Febreeze AF-FB1212.4 High Allergen Microparticle and Odor Reduction Air Filter, 12-Inch by 12-Inch by 1-Inch, 4-Pack Elecrtostatic air filter provides high performance allergen protection and fresh scent option Traps airborne allergens and reduces odors Includes optional fresh scent device that releases a hint of fresh scent throughout home Odor reducing technology built into air filter media 12 x 12 x 1 Febreeze filter lasts up to 90 days