During covid I settled on 3M p2 respirators. They're certified PPE but are disposable. The only BIFL options are things that use a positive pressure mask with a pump and replaceable filter and masks with a replaceable filter or two in the front

Both of the replaceable filter styles use filters that mass more than the disposable respirators, but last longer between replacement

Regular usage is much lighter than industrial, all filters last longer filtering town air than they do in a factory

During covid I used one p2 respirator for weeks before it became unable to seal, actually I used three to give them a chance to dry completely between uses

The masks with external filters make you look like you're expecting a gas attack; the disposable masks look like you have a cold you don't want to share