The Levoit replacement filter for the Core 200S air purifier is a sophisticated standard filter that effectively captures particles as small as 0.3 micrometers, thanks to its true HEPA filter, a high-efficiency activated carbon filter, and a sturdy nylon pre-filter. This filter is capable of removing 99.97 percent of allergy-causing substances such as dust, pollen, and smoke, as well as eliminating unpleasant odors and pet hair. It is ideal for individuals who rely on clean indoor air.