The mask fits well, nice and snug, once I figured out how to tighten it properly (pull tabs straight back not up). Breathing was a bit labored but I got used to it. Vision was unimpaired; there is a bit of distortion from the plastic mask looking at a distance, but perfectly fine close up. It did not fog up at all, but it does muffle the voice. It's not as heavy as it looks, in fact I wore it longer than needed because I kind of forgot about it after wearing all day. I wish I'd had it for some projects I worked on earlier this year. I bought this on sale during Prime days so very happy with the price.