Nilfisk Aero vacuum cleaner bags in fleece are fitted with a polypropylene closure for a better fit to the dust inlet pipe They are not affected by moisture or liquids. Keep the floor clean at all times with these bags. The durable fleece material catches dust and dirt and keeps it there. Compatible with: - Aero 20-01 - Aero 20-01 Inox - Aero 20-21 Inox - Aero 20-11 - Aero 20-21 - Aero 25-11 - Aero 25-21