Concertina
The folded accordion design ensures a high holding capacity whilst maintaining maximum airflow for much longer than many types of air filtration alternatives such as fibreglass rolls. With this design of paper filter your overspray is captured on both on the face of the filter and within the folds which allows the booth air to pass through the filter with minimal obstruction until full, thus a constant, smooth airflow is maintained for much longer than using other types of extraction filtration