HHM 4 These masks are a little bigger than many brands, and fit over my my nose and under my chin to offer a good snug fit, even with my beard. And without the big gaps at the cheek you get with surgical type masks. They are good for people with glasses, as I find they don't fog up the eye wear much at all, and so far have only had one case of the elastic breaking. Only drawback is it takes quite a long time for them to arrive.