Amazon Customer 4 it's only a week I have it so I still testing out. I'm using just while I'm sanding, cutting etc. wood. it's easy to use and it seems works well enough. it doesn't fit perfectly on my face so I'm struggling a bit to keep it in place for if I tight enough to have perfect fit on he chin it' too tight on the nose and if tight rightly on he nose it's a bit too loose on the chin. Anyway at the end of the day of sanding wood I don't cough anymore so it seems that it works well enough.