Carbon and HEPA Replacement Filters for TruSens Air Purifiers, 8.5 x 8.9The filter is at the core of purifying your air. Filter replacement is essential for your purifier to perform at its best. 360 degree filtration draws in air from all directions, collecting pollutants from around the room that may affect allergy and symptoms. Washable prefilter offers the first level of defense against dust and pet hair. Handwash with mild soap as needed. Carbon filter captures odors and certain gasses. HEPA Type filter removes