All collection bags with the exception of the “cascade” version (or the loop-through system) have a hydrophobic filter in the lid to prevent an overflow. The unique patented design of the collection bag ensures that the bag can be produced in a folded way. This ensures storage room is taken. After connecting the vacuum, the bags unfold immediately. The handles on the collection bags contribute to the easy and safe removal of the bag from the collection canisters.
In addition, thanks to the unique stable and robust design the collection bags remain upright after being removed from the collection canisters.