Made from 3-layer polyester fleece material, this dustproof and high-quality filter bag is reusable and designed for dusts of dust class L. It allows for the safe disposal of dry, non-hazardous dusts. The Longlife filter bag is robust, durable, and suitable for vacuuming dusts of class L. Thanks to the sturdy polyester fleece material, it can be reused 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.