Made from 3-layer polyester fleece material, this dustproof and high-quality filter bag is reusable and designed for L-class dusts. It allows for the safe disposal of dry, non-hazardous dusts. The long-life filter bag is robust, durable, and suitable for vacuuming L-class dusts. Thanks to the stable polyester fleece material, it can be used multiple times. Simply vacuum, open the closure slider, empty the filter bag, close the closure slider, and continue vacuuming. This ensures efficient, clean, and health-conscious work with a system.