I'm definitely a mask nerd and have tried many many different masks that show substantial filtration. The Bluna Facefit are the absolute best because they are adjustable, so you can get a good "face fit", as it were, and the filtration efficiency is over 99%. They're also fairly breathable, better than most masks at this filtration level. They are my go-to mask forever.
I like these masks. They are recommended by a scientist that test them. They are confortable and with them my glasses do not get fogged.
KollecteUSA has excellent masks but shipping is too expensive with them and the reason why I don’t buy them any more.