The material of the dust bag is durable fleece, which also withstands wet dirt and liquids. The collar of the dust bag is made of plastic, so it cannot break during use. In addition, the collar is equipped with a plug with which the bag can be closed after use, thus preventing dust from spreading into the environment when changing the bag. The original Nilfisk dust bag ensures the functionality of the vacuum cleaner even in extreme conditions and guarantees the best degree of bag filling.