Im using disposable masks most often. I have one in rubber but that is so uncomfortable so i tend to use the disposable ones. Im curious aswell if anyone has any suggestions.
You really should be using a respirator when dealing with fine particulates if you value your health.
I don’t have a Fuse, but I did just recently purchase a really great respirator in my opinion that is used worldwide. It’s the Sundstrom SR 100 in one of their Sundstrom Pro Packs that comes with a bunch of stuff. Practically everything on the mask is user serviceable/replaceable and it has the ability to accept an addon to allow for an external air source.