Review on 🔍 Polypropylene Disposable Face Mask Filter Insert (20 Pack) - 95% Efficient, 3 3/8" X 6" Size by Ronnie Saylor

I was very happy to find these filters. I spent quite a bit of time looking for filters for my C19 mask that were made in the USA. It was exactly what I was looking for. However, when I received them I noticed that they are perforated in the middle! If you hold them up to the light (mask test) you could see through the filter! Doesn't that defeat the purpose? The photo is inaccurate, at least in my case. Very disappointed. Buy with caution.