I think you've mischaracterized the results. 17 out of 27 couldn't wear your preferred elastomeric half face respirator for 8 hours. The mean time they would tolerate it was 6.8hrs. And that was only over a single day.
I said the median was 7 hours, not 8 hours. That's your mischaracterization. I did say "per day," so that might imply that it was more than a day, but at the time I posted, it wasn't clear to me if the study was for 1 or more days. That's my mistake.
A smaller study ran for 2 days, and there were almost no issues with wearing disposable respirators for 12 hour shifts.
Physiologic and other effects and compliance with long-term respirator use among medical intensive care unit nurses
https://dx.doi.org/1...jic.2013.02.017
Another study compared elastomerics and disposables: "After more than 1 month of use, no healthcare workers chose to return to [disposable] N95 usage."
Implementation of an Elastomeric Mask Program as a Strategy to Eliminate Disposable N95 Mask Use and Resterilization: Results from a Large Academic Medical Center
https://doi.org/10.1...urg.2020.05.022
Speaking from experience, these things do not get easier to wear as time goes on. Rashes and skin abrasions take weeks to show. Anyone can put up with something like this for a day. Come back and talk to me after a year.
If you're concerned about skin issues, you can just take more frequent breaks. Thousands of health care workers have probably (I don't have a study to cite but it seems a fairly safe assumption to make) worn this stuff for many hours every day during this pandemic, but I haven't heard about their faces falling off. And again, there are many trades (painting, construction, mining, etc.) where wearing respirators for long periods of time every day for years is a requirement.
How many hours have you actually sent wearing a reusable respirator? In another comment, you mentioned that you couldn't imaging wearing "that thing." Now you say that one day might be okay. Perhaps your skin is too fragile for regular respirator use, but this doesn't seem to be a common problem.
If you'll read the results of this study, it hardly seems positive on the tolerability of wearing these sorts of masks and respirators.
The point is is that they're tolerable enough to be worth using.
Edited by Florin, 16 March 2021 - 08:36 PM.