Natasha Bridges 4 I think it is effective in helping to purify the air around me. There is a little bit of a smell that I do not care for while wearing it. To fix that I wear it lower, however, I wonder if it's still effective at that distance? The packaging also tears easily so I had to tape up the sides and I bought a lanyard to keep it in, which helped a lot. I will subscribe and see if it helps me with the frequent colds I catch.