Paper dust bags
The paper in a dust bag is a strong but porous composition. The paper dust bag is not only a bag but acts as a filter in such a way that air blows through the material while debris and dust is trapped inside the bag.
Paper bags are cheep to manufacture and are there by cheep for the end users. In addition, paper bags are really effective for home users. Paper bags are also biologically degradable and are therefore environmentally friendly.
Since paper bags are often manufactured on regular paper mills they are generally not licensed by the vacuum cleaner manufacturers, and then they are considered to be pirate bags.