Blueair Blue Pure 411 Max Series AllergenBlock Filter, Genuine Replacement Allergies Pollen Dust Pet Dander,411 Filter Fits 411i and 411a Air Purifier

BOOST ALLERGEN PROTECTION: AllergenBlock defense layer neutralizes over 90% of the allergen properties such as sneeze-inducing dust, pollen and pet dander that can trigger discomfort* UPGRADE YOUR DEFENSES: Blue Pure 411i Max Series AllergenBlock Blueair filter is designed for optimal performance; Compatible with 411i Max and Blue Pure 411a Max air purifiers SNEEZE-INDUCING ALLERGENS: Four layers of air purifier filtration; AllergenBlock defense layer neutralizes over 90% of pollen, dust and pet dander on the Blueair filter; Carbon layer reduces light household odors* AUTOMATED FILTER REPLACEMENT: Subscribe and save up to 10% on auto-delivered filters when replacement is needed; When used 24 hours a day, your Blueair filter should be replaced every 6 months to effectively reduce airborne pollutants and allergens