This is sometimes an “optical illusion”. Good masks have a metal sheet there that you can bend to fit your nose. However, when you bend it, the outer cloth of the sheet pocket will not follow the curves as tightly, if at all. It appears as if the wearer had not attempted to bend the metal sheet at all.
I’m not sure what this means. The use of an N95 or equivalent provides value only when rightly fitting. It sounds like you’re describing a mask that gaps no matter how it’s fitted.
A lot of the people I see like this seem to have bent the nose piece so tight that it’s actually lifting the top edge off their faces (because the nose cannot fit in the tiny space created). I’m not sure if they think the absurdly tight nose piece is sealing better or if they are intentionally doing this to make it more “breathable”.
Ah, I see what you mean. I’m pretty sure that I’m not seeing an illusion most of the time, because I’m not looking at the cloth. I’m looking at the very visible skin beneath the gap. But it makes sense that the outer layer of cloth could be misleading.
> The too-tight nose piece is probably because that’s how the masks are packaged.
You’re probably right. I normally see this on the center-folded masks. This would mean that people are just throwing on the mask without fitting rather than doing an astonishing bad job at attempting to fit, or intentionally fitting to create a space. That’s certainly more understandable.