I am using this respirator while cleaning mold and need it only for that reason. Tons of mold spores go into the air when you are cleaning it because they are usually sitting on the surface dormant until they are disturbed. When you use negative air pressure to pull the mold spores outside of the house it is very possible for you to breathe in black mold or toxic mold that could make you very sick instantly. This respirator works very well and is easy to breathe through once you get used to it. Putting on the filters isn't too bad either and you will find it pretty easy. The straps are strong and lock airtight to the face.