@FinchTH I think even with a brace you still need to close the nose clip to have any kind of decent fit, and many people don't do that (also some crappy mass market "surgical" masks have really bad nose clips). May depend somewhat on nose shape.
@FinchTH 我认为即使戴上支架，您仍然需要合上鼻夹才能获得任何体面的合身性，而且很多人不这样做（还有一些蹩脚的大众市场“外科”口罩的鼻夹非常糟糕）。可能在某种程度上取决于鼻子的形状。