Masks are not good for you . At work today, both of us wore a mask. We wore them about 4 of the 6 hrs we worked. When we were done, were were both sore and tired. It was a physical day, but we could tell that we were more tired than otherwise. It was surely the mask that was giving us less oxygen. I blew my nose when I was done and there was dirt in my nose. They were N95 masks and still likely only stopped 75% of the dirt .
I know what you mean.
I only wear one at the bench where I would inhale metal dust and aluminum oxide....or when working with fiberglass.
At least I can take frequent breaks, get my O2 back up while working on something else. These poor kids don't have a chance except for the parents protection.
