Even better than I thought
This is a good mask that allows people to see your expression. I bought it to use with students. It definitely has a good seal, & I like the fact that you can fit it to your chin, as well as your nose. By following the instructions, it does not fog up. My biggest complaint is strictly personal preference, in that it has such a good seal, that it does get a little warm.  (was actually very nice outside in the winter)
Rating: 5 stars