Moldex 2200n95. The 'k' basically has ear loops instead of head straps and doesn't give quite as good a seal.
I've been using them for a 25+years for sanding/finishing work. They are ugly, but they do form a much better seal than any kn95 and regular n95 mask I've used. No clue how effective any of these are against viruses, but if after a day of sanding (even with a light beard) my snots are clear vs mahogany...that's a good mask, lol.
Here’s the inside of one I’ve been using the last couple days. Shows where the potential leaks are. Clean shaven, I get a somewhat more defined line.
