Bests & Worsts Reviews from Amazon

There are 2 tests that can tell if your mask is effective. One is to try to blow a a candle through the mask while wearing it. If the candle goes out, the mask is uselesss. The other is to let few drops of water sit on the outside of the mask when it is off., If the water beads up, the mask is safe. If the water is absorbed, the mask is not effective. The Sonovia passes the candle test, but failed the water test---a drop-off water was absorbed and penetrated the fabric.