Not all masks are created equal! The mask you need to protect from COVID should not have valves as the virus can be expelled. Most N95 masks have valves. The mask you need for wildfire smoke - which sadly contains the toxins of burning homes and cars - is an N95. We have just gotten in some masks that address both! A KN95 without valves. These are disposable and come in a 5 pack. IF you are in a situation where you worry about both these are a must have.