The Kärcher 6906101 (6.906-101.0) genuine fleece filter bags are an essential accessory for Kärcher WD 4, WD 5, and WD 6 series wet and dry vacuum cleaners. This pack of 5 highly tear-resistant fleece bags provides significantly longer suction periods compared to traditional paper filter bags, thanks to their superior dust retention capabilities. Designed for optimal performance and durability, these bags ensure efficient collection of dry debris, maintaining the vacuum's suction power and extending its operational life.