These Numatic Hepa-Flo NVM-1CH vacuum cleaner bags are made of microfiber. They're specially designed for your Numatic vacuum. These vacuum cleaner bags last a long time and are easy to seal thanks to the special closure, so you know the dust'll stay in the bag. You'll find 10 vacuum cleaner bags in the packaging. Suitable for the Numatic James, Henry, Hetty, and Harry.