These cloth bags are an integral part of the Pulsar mold, lead & asbestos recovery vacuum. It acts as another filter for the recovery system, and if it becomes damaged in any way, it needs to be replaced immediately. The line this cloth bag, and if that paper bag becomes compromised, this cloth bag acts as a liner, and a secondary line of defensive from the recovered materials being sucked through the vacuum motor and exhausted back into the air. When recovering toxic materials such as mold, lead paint, or asbestos, we recommend disposing of that paper bag immediately after the job is finished. This ensures that you come in contact with as little of the damaging debris/particles as possible.
We also carry the replacement if you are looking for all the replaceable consumables for this vacuum. These cloth bags and the HEPA filters are sold individually, where the paper bags are sold in packs of 3.