DESC: You may not be able to see them but the air you breathe if filled with microscopic microorganisms. Most are fairly neutral but others may cause allergic reactions and other discomforts. That's why you need an air filter. Hamilton Beach TrueAir Air Purifiers help reduce airborne dust mites, animal dander, mold spores, smoke, odors, and other allergen particles so you and your family can breathe easier.