Tom, you're welcome. Just so you know though, from what I have heard they are NOT HEPA grade cloth bags....just cloth. From what I have read & heard, the quality is acceptable & they are durable, but not necessarily filtering as well as a cloth bag that is labelled HEPA. Somewhere in between the filtering capabilities of the 4 ply bag & a HEPA bag. Also, when you look at what they are selling for the bags if you buy the 100 pack, it makes sense. It does seem like this is becoming a trend with other generic brands of cloth bags too....Bill/VacLab's tests on the Clean Fairy brand of Kirby bags certainly showed a notable difference in filtering performance between them and Genuine Kirby HEPA Cloth bags. I would definitely buy a small pack first and see if you like them.
There are also the DVC Allergen Performance cloth bags as well, although I highly doubt you could buy those in bulk and get a cheaper price per bag. And, while looking on the web, I think I may have found who Aerus is getting their cloth bags from....sure looks the same, minus the lettering on the cardboard collar! Interestingly though, when just doing a quick Google search, it shows the company as being Blue Sky and shows the photo of the bag, yet not when you go to this link...odd.
If it's the filtration of the paper bags that's making you think of using HEPA Cloth bags in your Guardian, there are a couple solutions actually. There's 1 company that supplies to Hibbert International here in Canada that is manufacturing 4 ply paper bags WITHOUT the blue sealing strip that holds the bag together at the back. Instead, like a Kenmore 5055/C paper bag, it's folded over & glued together in the back. They also make a 4 ply Style C bag the same way, & the Arm & Hammer & Clean Fairy Style C bags are also made this way now. I won't be surprised if I see other bag manufacturers start implementing this change, & following Aerus since the current blue Home Solutions bags eliminated the blue sealing strip a couple years ago. From my experience, both with the Home Solutions bags & the 4 ply bags, it's the sealing strip that seems to cause issues & break at the back, not the bag material itself.
The other solution would be to use a Kenmore C/Q HEPA Cloth bag to line the bag compartment on your Guardian, then use a paper Style R bag inside. Then the cloth bag would capture anything that escapes the paper bag, should you not be able to find a supplier for the Style R bag in America that makes them folded over & glued in the back. I know you have said in past posts you change your bag after each vacuuming session because of your dog Daisy Mae's pet hair stinking up the bags, so I am sure that rhe cost per bag would also be a concern too. This solution would strike a perfect balance between cost per bag & filtration.
Rob
https://www.vacuumbags.com/elstrrealhip.html
https://m.made-in-china.com/product...Vacuum-Cleaners-Part-140701504-690537142.html
https://www.hibbert.ca/buy/product/ba10-28-electrolux/122?ID=/Bags-Vacuum-Cleaners/Paper/dept-27W