These seems to be of good quality. They come in a pack of 50 wrapped in plastic. Each filter is NOT individually wrapped. They are slightly narrower and a little longer than another filter I had purchased. This makes it a little easier to slide into the mask. They seem a little softer than others I have, but this shouldn't matter since the flter goes in a sleeve and doesn't touch your face directly.Overall this seems like a good filter for masks that can accept these kind of filters.
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