About this item

• 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 311 Auto Series AllergenBlock Blueair filter is designed for optimal performance; Compatible with 311 Auto air purifier.
• 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.

Upgrade your defenses and 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. Blue Pure 311 Auto Series AllergenBlock Blueair filter is designed for optimal performance. Compatible with 311 Auto air purifier. *AllergenBlock refers to inanimate allergens pollen, dust and pet dander. Based on ELISA deactivation testing of Pollen (Cry J1), Pet Dander (Fel d1, Can F1), Dust Mite Matter (Der f1) on the filter media in 60 minutes.