Miele Genuine GN AirClean 3D Efficiency bags feature a self-closing hole with 9 stage filtration, ideal for allergy sufferers. A 3D design allows them to hold more dirt by opening in the shape of a microwave popcorn bag. Unlike traditional flat bags this significantly increases their abilitiy to hold more dirt. They also feature a protective netting for extra strength. Fits S400i - S456i, S600 - S658, S800 - S858, S2000 - S2999, S5000 - S5999, S8000 - S8999, Classic C1, Complete C2, Complete C3 series models. Also includes 1 pre-motor filter and 1 super air clean post motor filter. Genuine Part - Miele 7189520. For optimum performance and minimal foul odour, change bag every 1-2 months or when 3/4 full. Store vacuum bags in a clean, dry place.