Bosch VB090R Reusable Fleece Filter Bag for use with VAC090 Dust Extractor, 9-Gallon Reusable fleece dust bag for Bosch VAC090A and VAC090S dust extractors For easier, cleaner disposal of vacuumed materials Acts as pre-filter for large debris and may increase the life of the main filter Only for use when vacuuming dry materials