A bag of very good quality, good suction performance until the filling, cleaner air, yet the bags are a bit big compared to some suction receptacles ie that the large bag can hold more dust volume but too just across receptacle of some vacuums that the bag can not be deployed to its maximum capacity, it is the case for the Electrolux Clario Silence Z1946, since it is a device that also has 15 years now, the time was probably studied it for traditional paper bags only; Now the generation is changing all the time; a bag to a short lifetime of about 6 to 8 months of times ... without changing to a suction once a week;