I have the MG2 version. But I found the normal Tri-Star bags leak a lot of fine dust into the cloth bag. MicroLined Tri-Star bags have the issue of the lining being torn away from the paper on the side of the bag where the dirt and debris always hit with force. Then, it leaks fine dust too. My only option was to cut a HEPA bag open, and use that to line the cloth bag. That works like a dream, and no fine dust leakage.