Breathe Naturally Universal Cut To Fit Carbon Activated Air Filter - Replacement Charcoal Filters - Pre Filter Carbon Sheet for Air Purifier, Vent Filters & More - Made in USA (Pack of 2, 16x48)

These a very thick and durable. Easy to cut and fit into my AC unit. I also used them to line my cat’s litter box and I believe it did help a lot with the smell and dust that leaves the box. You also get so much in the pack. Great product!

I bought the 24" x 24". They are about 2 mm thick (0.07" thick - not 0.2" as advertised). Not at all sufficient for what is needed. Flimsy. Super disappointed.

I have an older round honeywell air cleaner and can't get filters in my store anymore (they say my model is too old) This fit, was long enough to get all the way around the permanent filter and I will be able to get a second one out of the material left over. It filters well. We've had a lot of forest fire smoke and my air cleaner is running non stop - no trace of smoke in my apartment

This filter does exactly what it promises and doesn’t try to be anything fancy about it and honestly, that’s a win. It’s easy to cut to size, fits perfectly in my portable and window air conditioners, and installs without any drama. I use these mainly to help catch dust, pet hair, and general household “mystery particles,” and they’ve been doing a solid job. Airflow hasn’t been noticeably restricted, and the added carbon layer is a nice bonus for improving overall air quality. Nothing complicated here: cut it, install it, forget about it. If you want a no-nonsense filter that works and is easy to customize, this one gets the job done.

Great price, plenty of sizeable options that I can cut with ease. 12x48 gives me double the filter size I need for a great price. Can’t wait to breathe better.