Shop vac bags allow the user to collect debris into a dust bag connected to the inlet port, to prevent it from blowing back. This makes debris disposal quick and easy as well as reducing the time required to clean the wet dry vacuum cleaner Wet dry vacuum bags are designed to collect non-hazardous, non-toxic, dry everyday dirt and fine particle debris Do not use for wet debris. Remove dust collection bag if picking up wet messes or liquids Fits most 15-22 Gallon Shop-Vac* branded wet/dry shop vacuums This package includes 3 wet dry vacuum dust collection bags Replace your wet/dry vacuum cleaner filter and dust collection bag often for optimal shop vacuum cleaner performance Includes 3 filter bags Use only for dry pick-up Designed to fit: Most 15 to 22 Gallon Genie and Shop-Vac wet/dry vacs. NOT for use with WORKSHOP products