The Big Vac Disposable Filter is made to get the job done. Designed for dry pick up of dirt and fine particles. Allows you to dispose of the debris quickly and easily without having to breathe in dust, just remove the bag from the vacuum and discard. Fits Big Vac Wet Dry Vacuums 4 - 5 Gallon series as well as Kubota, Toolmaster and Fixman Wet Dry Vacuums 4 - 5 Gallon series. Bag is brown in colour and made of paper.