All-in-one filter system combines HEPA with activated carbon and a separate washable prefilter. Engineered to capture microscopic particles, allergens and volatile organic components (VOC’s), and odorous gases. The 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. Replace every 3 months. True HEPA filter removes pollutants as small as 0.3 microns – that’s roughly 30 times smaller than a strand of hair. Change indicator light is displayed on your air purifier when filters need to be replaced. Compatible with TruSens Z3000 air purifier. 8.5 x 8.5 x 8.9 in. Sold by each.