I've used true blue filters for a while. In the past, these were high-quality and expensive filters. Obviously they started cutting corners and sacrificing quality. The filters I received today (same Merv review as before) are slightly smaller, fewer wrinkles and the material is slightly thinner. These factors make the filter cheaper to manufacture but of lower quality. Now they're just average. They used to be better than 3m filtrate. Now they are a little worse. The difference in price might still make them a worthwhile buy, but it's disappointing that the true blue has taken a good thing and made the quality cheaper. Once I use the filters I just got, I'll probably look elsewhere. I might end up with real blue, but I'll definitely look for a better one
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