Best I've used:
3M N95's. I bought them for wildfire smoke in N. California way before the pandemic. I was working on my garage, trying to finish before the rains 3 years ago, needed masks to survive. I got them cheap off Ebay. I had bought some non-3M N95s locally that sucked. One 3M order off ebay had vents, and I wear them skating the streets daily. The other set are 3M 9210, which have no vent, so are better for the pandemic. Both 3M sets fit perfectly when I am careful how I put them on. They also work best when I'm clean shaven, and if I'm concerned about infection I will shave before going out with one. I gave away more than a dozen 3M N95s but now I'm holding onto them.