Not ANSI approved or vetted KN-95 Chicom knock off masks.
Not proven by a credible standard of measure to be any better than a wet paper towel.
It depends. There are NIOSH approved duck billed N95 masks. These masks are not new and have been around for a while. Some people prefer them. I've never personally used one so I can't comment. My wife has and as far as I know she liked them. This was pre covid.