Every. Last. Particle. They fit well and seem to have quality construction. Nothing to complain about!

Good air filters at a good price. We have been using these for a few years, and they seem to help with allergies, etc.

They fitb perfectly & do an excellent job. I love that Sam's usually has a great deal on these too. Highly recommend

Usually I am happy with these,but I must return them this time because they must have gotten wet. They are stuck together

We have been using these in our home for years. We change them about 2-3 times a year and appreciate this value at SAM's.

Its just 25 days I used this product. My wife felt a change in dust layers on furniture n felt air more fresh n not muddy smell.

Four pack of 12 x 12 air filters cost $20 ea at Home Improvement stores. So four pack for $39.99 is a deal.

Have not opened these yet but it is a product I use almost exclusively and is always a good performer.

My son an HVAC technician said too high of a rating makes your furnace work harder. This was the only filter I could find that fit my furnace

These are great! We found out that my son is allergic to our cat. These filters help a lot! And I have noticed we have less dust.