Clear The Air Merv 11 filter Removes 91% of airborne particles. Our Merv 11 filter eliminates allergens such as dust mites, pollen, mold spores, pet dander, dust, and smog. Our advanced pleat technology provides less air flow resistance, with higher efficiency and lower pressure drop allowing air-handling systems to stay cleaner and operate more efficiently. This filter is Ideal for allergy sufferers. Clear the air Merv 11 filters are available in 45 sizes so you are sure to find what you are looking for. Clear The Air Merv 11 Pleated Filters are available in 1", 2" and 4" depth. The electrostatically charged 100% synthetic graduated density media is continuously bonded to a 30 gauge galvanized, corrosion resistant, expanded metal support grid with an effective open area of 96%. The media is resistant to a wide range of chemicals, does not absorb moisture and will not support microbial growth. The controlled pleat spacing maximizes surface area and dust holding capacity and is bonded to the enclosure frame to prevent dust bypass. The enclosure frame is constructed of high wet strength moisture resistant beverage board. The diagonal support members of the frame are bonded to the entering and exiting apexes of each pleat to prevent pleat collapse and filter bowing.