3M 8293 - P100 Particulate filter. These are considered disposable, but last a long time, with care. Sort of square looking, and easy to breathe through. A little more than some, $8-10 each, depending on where you get them .
These are not rated for some vapors, and only a cartridge, professional type, truly is .
It is however rated for metal fumes, uranium and plutonium. So they are tops, in the disposable line.
Take it from a guy with COPD, and on full time oxygen, if there's ANY doubt in your mind, that your exaust system doesn't keep you 100% safe, wear proper PPE.