I have a bench polisher and whenever I go into the bathroom afterwards to wash my face, I always have red dust up my nose. Even if you have dust extraction most of us don't, you still cant avoid getting tiny airborne particles of flock, dirt and polish, all of which you are breathing in. You may feel fine now, but if you are doing this all the time, then then effects will add up.A paper dust mask is better than nothing, but for total protection, the only solution is one of these professional respirators. It will keep you safe and breathing clean air all day long. These masks are lightweight and surprisingly comfortable. If you have a bench polisher then I feel that they are absolutely essential.Its a small investment in your long term health.