I have to use those white 3M dust masks during the dry season or when mulching leaves in the fall. I kick up quite a dust bowel. Otherwise I'm blowing black stuff out of my nose at bedtime.
I work in a chemical plant so we have all sorts of masks we have. You can get those comfo masks with replaceable dust filters like this one:
But I found the disposable 3M masks with the yellow bands are way more comfortable.
The other alternative I've done in the past is to take an old T-shirt and cut it and wrap it over my mouth and tie it in a knot behind my neck.