Universal Carbon Pre-filter. Your True HEPA filter’s first line of defense.
Your True HEPA air filter captures microscopic particles. The pre-filter that wraps around the HEPA filter captures large particles first, including dust, lint, fibers and pet hair. Pre-filters also reduce odors and maximize your HEPA filter’s life. The replacement package contains one large pre-filter with a perforated design that makes one to eight pre-filters depending on your air purifier model.