Extremely good bags for Panasonic and Kenmore. I use them on Kenmore Progressive Racks and nothing comes out of them. Drywall dust typically passes through a vacuum cleaner bag and ends up inside the vacuum cleaner. I picked up a bunch of drywall sanding dust and to my great surprise there was nothing in the vacuum. The box is well glued to the bag. A bag in the form of a piece of cardboard inside the bag opposite the inlet to protect the bag from foreign objects entering the bag at high speed from the hose.