Mask Doesn News Today

If correctly fitted. >> we do want to make sure they fit properly so you dont want air escaping from the sides, underneath or around the eyes. got to make sure its really snug. but its an effective mask. thats the thing. >> reporter: one expert says n95s are very similar to kn95s because they both have high efficiency filters. but the n95 has a slight edge over the kn95. >> it provides a better fit to your face. if a mask doesnt fit your face well, its going to leak. >> reporter: another key que...