I have used these filters for several years and don't have to change them out as often as other brands. Although it states they last 3 mos, I usually swtich them around 2 mos in summer. I don't have much along allergys so I can't speak to it's effectiveness or maybe that's why I don't have allergys :-)

My friend recommended these filters and I'm very happy using them. The air is a lot cleaner; I don't have to change the filter out for 3 months. I highly recommend, although pricey, it is definitely worth the money. Also, they have a reminder when to change out filters.

Perfect fit! Not everyone carries the 20x30. Great price for 4.

Always buy these on sale at Sam’s Club. Good value.

These are very good filters.

They’re great. I notice my house doesn’t have hardly any dust anymore.

These work well I have been using these for quite a few years now

These are the filters I usually buy at Walmart, but this was a better deal.

Great price and works good. Always the the best price

Excellent filter especially if you have pets and deal with allergies