Oreck Superior HEPA Media Filtration Bags - 25pk, AK1CC25H 5 Layers of HEPA Media filtration trap at least 99.97% of even non-visible particles 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 performance, only use Oreck Certified Filtration Bags.