Don't be fooled by other generic paper vacuum filter bags. Maximize your cleaning efficiency by using only genuine ProTeam filters. To safeguard the Indoor Air Quality of your facilities and to optimize the performance of your vacuum cleaner, change filters once they are half full. These filters are closed collared and non-reusable, ensuring dust and particles stay inside the bag. Fit cylindrical 10 quart backpack vacuums and come in a pack of 10.