The Makita Fleece Filter Bag is designed for use with the Makita 11 Gallon Wet/Dry HEPA Filter Dust Extractor/Vacuum (VC4210, sold separately) to capture dust and debris. The bag features a fleece design for added durability. Like a first-stage pre-filter, the fleece filter bag captures larger particles and extends the life of the main flat filter. It installs quickly and easily for added user convenience.