4 Pack 121 Replacement Washable Pre-Filter for Blueair Blue Pure 121 Air Purifier, Removes Pollen, Dust, Pet Dander (Lunar Rock, Diva Blue)

Premium fabric: 121 replacement pre-filter is made of high quality nylon and spandex material, which is densely woven and will not fade or shrink, and is extremely flexible and tough. | First line of defense: 121 cover is the outermost layer of the air purifier and effectively removes larger particles, hair, pollen, dust and pet dander, extending the life of the filter. | Easy to use: Washable pre-filter for Blueair Blue Pure 121 Air Purifier, removable, washable and reusable, we recommend you clean it once every 2-3 weeks to maintain the peak performance of your air purifier | Home Decoration: The package contains 4 121 pre-filters replacement, 2 lunar rock, 2 diva Blue, you can replace different colors pre-filters based on the position and scene placed in the air purifier to facilitate decoration of your room | Warranty: If you have any questions about our products, please feel free to contact us, we will definitely give you a satisfactory answer within 24 hours