Your home should be your sanctuary, starting with the air you breathe. Filtrete Premium Allergen & Ultrafine Particles Air Filters help capture unwanted particles from your household air, contributing to a cleaner, fresher home environment. By proactively capturing dust, bacteria, viruses and allergens, these high performance filters help improve your home’s air quality.Your home should be your sanctuary, starting with the air you breathe. Filtrete Premium Allergen & Ultrafine Particles Air Filters help capture unwanted particles from your household air, contributing to a cleaner, fresher home environment. By proactively capturing dust, bacteria, viruses and allergens, these high performance filters help improve your home’s air quality.