20x20x1 3M Filtrete Micro Allergen Filter (1-Pack)

The 20x20x1 Filtrete Micro Allergen air filter captures everything from dust and pollen to the tiniest allergens like smoke and pet dander - without draining your wallet. And talk about having your cake and eating it too - the Micro Allergen goes to work every time your heating and cooling system kicks on. It's like having an expensive whole house air purifier, only cheaper!

• Outperforms all competitors 3-month, 1-inch filters
• Electrostatically charged fibers act like tiny magnets to capture even the smallest particles
• Genuine OEM Product