2 Layers of Allergen filtration traps 99% of particles at 5. 0 microns or greater & coating on the paper reduces on-filter odorSaniSeal 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. Great for users with low to moderate allergy concerns in their homepatible 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.