Clean the air of your home with Filtrete's micro allergen reduction filters. This specific model comes in 30 in. x 60 in x 1 in. It's up to 20 times more efficient than fibreglass filters. It captures and traps a lot of different airborne microparticles, airborne allergens, and large particles: smoke, smog, pollen, pet dander, mould spores, pollen, lint, dust, etc. Each filter can last up to 3 months before needing to be changed. They're designed to keep the air in your house clean, safe, and optimal. They even meet the American Lung Association Health House Indoor Air Quality Guidelines. These filters can only be used in residential buildings.