3M Particulate Sanding Respirator

This is probably one of the smartest safety investments someone can make. These are lightweight and comfortable, the nose piece is adjustabable for a more custom fit and safety glasses stay fog-free. They are inexpensive so that they can be changed as deemed necessary. The cheaper brands/type only have one elastic strap, this one has two elastic straps which gives a more secure fit. If you want to keep all the dust out of your lungs this is one of the best approaches.