HEPA filter – captures 99.97% of particles larger than 0.3 microns Enhanced low-stick surface – improves the filter-cleaning process Fleece bag recommended – used to maximize air flow and to protect the filter from being directly exposed to abrasive materials and sharp objects Bosch PRO+GUARD – provides HEPA filtration as part of an end-to-end dust-protection system Designed for dry-vacuuming only – the VF130H is not intended for wet-vac use and will be damaged by wet-vacuuming; Bosch offers the VF110 polyester filter for wet-vac applications Engineered for Bosch Dust Extractors – compatible with VAC090- and VAC140-Series dust extractors