This is a genuine Blueair replacement filter designed specifically for the Blue Pure 311i+ Max air purifier. It consists of the main filter which removes airborne allergens, and an activated carbon layer for trapping common household odors form cooking, pets, and smoking.

Blueair recommends replacing filters approximately every 6-9 months. You can also track filter usage with the Blueair RealTrack algorithm available on the App.

Part # 110038