The Miele AirClean 3D Efficiency Dustbags are equipped with an Auto-Seal™, self-locking collar that keeps microscopic dust and allergens safely trapped inside, so you never have to worry about releasing the lung-damaging particulates, dust and allergens you just captured back into the air, even during disposal. The New Soft Structure allows your vacuum to operate efficiently while using a lower suction setting. Each box contains 4 dustbags, 1 standard filter, 1 pre-motor filter.