Dislike the quality
Very stiff! So thick that it muffles my voice, and I have to pull my mask down to speak. So I just took out this filter and wore my old disposable ARMBRUST brand mask behind my silk mask meant for this insert.<br />Will not buy again. I don't recommend. Feels like flexible cardboard rather than cloth, if you understand what I mean.<br /><br />I was apprehensive because it provides zero information about being certified for particle blocking. I think they just stamp the PM2.5 just for marketing. Seems awful through & through.
Rating: 2 stars