The NaturalAire Good is made of MERV8 wire-backed pleated media. This filter provides up to 90 days of protection against many airborne particles that can aggravate seasonal allergies and cause unhealthy environments. The NaturalAire Good is convenient and easy to replace which makes it a great choice for improving indoor air quality. The NaturalAire Good is effective against the following contaminants: pollen, pet dander, nuisance dust, and dust mite debris. The leader in the air filtration, Flanders provides air filtration products for pharmaceutical laboratories, the space programs, nuclear containment, and commercial industries.