Sneeze while wearing one and hold your hand in front of it. You'll feel the moisture. Then try blowing out a candle while wearing one, you'll blow it out. The only true way to be totally protected is to wear a biohazard containment suit like they do when they're researching viruses.
no, the n95+ masks have filters designed to filter out airborne viruses such as the coronavirus. obviously air can pass through an n95+ mask though, so that test would not be conclusive.
