Used these for years with great success

What can one say? The filters do as advertised.

A 1600 filter at the price of a much lower grade at other stores.

Furnace filter does the job.

Used these filters before great but

I loved them but I couldn't buy them again it's always sold out.

My favorite; they work as advertised

I found these much cheaper on amazon, with next day delivery. I’m returning these today.

These a great deal , liked the product , just we have a whole protection of the allergy

Works very well. Better than all the other brands