These filters are identical to the ones that came with my Shark Navigator Freestyle. After a short time I had problems with my navigation system switching off. After cleaning the filters several times, the problem reappeared. As a result, I found that the filter was so clogged, the flush stopped working, and the navigator heats up and shuts off. I should note that I pick up A LOT of kitty litter, which is high in very fine particles. Replacing the filter solved the problem and my floors and I are happy again.