kn95

Small study, but I thought it was interesting how well N95 respirators worked without any fit testing. I remember at the beginning of the pandemic there was a lot of concern about how well these type of masks would work for the average person without any fit testing. Measuring the fitted...

I rarely go out and seem to have ended up with a bunch of useless masks. I'd like better ones. I gather that cotton ones, even with a tissue layer, aren't much good; I've bought some that are supposed to be better, but they don't fit, so presumably are 100% useless for self-protection. What are...