The long life of the Menalux 4900 synthetic dust bag is due to the fact that its surface does not clog and therefore its suction power is not reduced, so there is no need for frequent replacement. Thanks to its synthetic material, dust does not enter the interior of the vacuum cleaner, thus extending the lifetime of the device. For similar reasons, it is also a good choice for people with dust allergies, as dust cannot escape from the dust bag. It is an environmentally friendly product.