I used Venus "N95" masks last year with Butterfly valve. Didn't really felt that it filtered anything, even traffic smoke was perceptible upon inhalation. Not that I was putting my face against an exhaust pipe of a truck to test it's efficacy.
Last week ordered a pack of 5 of "N95" from Mankind pharma. They turned out to be schiite. Along with those ordered a 20 pack box of 3M 8210. It had mixed reviews but couple of dealers there, who were offering it for a higher price, guaranteed a sealed pack box. So went with those. Got a sealed pack box, with hologram and QR code for authentication and all. When I took my mother for her 1st shot of vaccine, Doctor there was also wearing the same mask. Figured if it was good enough for him, it's good enough for us.
In case somebody wants to know:
https://www.amazon.in/gp/product/B08K1N9SXZ/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&psc=1