With 5 Layers of HEPA Media filtration that helps trap at least 99 97% of even non-visible particles at 3 microns. SaniSeal System automatically locks in allergens dirt & debris upon disposal significantly reducing the “dust puff” created by other vacuums. Extra-large capacity holds up to 4x the amount of dust dirt and debris of a typical bagless vacuum. For optimal performance change filtration bag when maximum fill line is reached. Perfect for users with allergy problems in their home & for pet owners. Compatible with the new Oreck ELEVATE Upright Vacuum Collection & all Oreck vacuums with docking systems to ensure optimal filtration & cleaning.