A healthy home begins with cleaner air. Improve the air quality in your space by reducing the amount of airborne allergens with a Filtrete Allergen Defense Micro Allergen Deep Pleat Filter. Using electrostatic technology, this high-performance furnace filter turns your central heating and cooling system into a whole-house air cleaner by attracting and capturing microscopic allergens like pet dander, smoke and household dust, while also taking care of larger airborne allergens such as mould spores and pollen. For maximum performance, replace your Filtrete Filter yearly (every 365 days) to ensure you and your household are breathing cleaner air.