I don't have any means to test my vacuum. I have a Sanitaire Tradition that uses ST bags. I started with the Sanitaire brand premium ST bags which are cloth. Then I tried the Envirocare bags with this recent bag change. I have 20 year old medium pile carpet (noting it's age because it is matted and lower pile in high traffic areas now). With the Sanitaire bags, I was vacuuming on height level 3. With the Envirocare, I have to use it on height level 4 to be able to push the vacuum. My guess is that boost in airflow really pulls the vacuum to the carpet. I like those bags!

Oh my goodness gracious! I might have to get the ST conversion kit and ST disposable bags too! Good luck in your testing! I am hoping that the ST bags and the Koblenz bags will do well in testing!

I’m happy the expensive Koblenz bags were exactly what I and others thought they were, and more. I feel those are thicker than the VAC hepa bags.

I wonder how it would work by leaving the bag attached to the vacuum and take it outside, remove the clip, and turn on the machine to blow its own dirt out of the bag? LOL

My grandma used to use a metal Royal with F&G bags that were single ply paper and it would leak dust everywhere cause she would use carpet cleaning powder not the bad stuff she buys The best stuff you can get so finally I gave her a Dyson DC 17 with Hyppa filtration h10 probably and I helped to do the carpet cleaning it did not spray dust everywhere like the royal did and I do not like bagless machines my favorite her bag but yet I gave her that when I did not like bag machines I’d like bagless more now I love my bag vacuums

I would say it doesn't say HEPA because it's 99.7% not 99.97% which I believe makes it HEPA certified

finally it’s snowing in the city where i live even though it’s a desert

Hey Bill will you please buy a dump out Sanitaire MM Vacuum Cleaner bag for the Mighty Mite?

the mighty mite bag is made bissel strange wonder why

are premium sanitaire bags similar to hepa bags