If you have a job that requires vacuuming up drywall dust, cement and other fine powder type material, your Shop Vac model will operate more efficiently with these bags that are specially designed for your project. Other bags may not capture all of the dust and create even more of a mess. They should be used for dry pick-up only. The top features of this product are highlighted below. Built with an inner lining to improve the durability, holding capacity and filtration ability of the bag. Easily attaches and detaches for convenient disposal. Without this bag, your vacuum filter would become clogged and not run as efficiently as it could. Perfect the following job types: Drywall dust, fine dust, cold fireplace ash (not for use with hot coals), cement dust, furnace clean up, wood stoves and auto refinishing clean up.