Needed a replacement Dyson filter because I bought a second handheld vacuum and the previous owner had magically tricked the original into slowly disintegrating. not sure if and how they followed the cleaning instructions. That's why I got one here. Works as intended BUT I'm no liver filtration expert and can't prove it removes %%% of allergens and such. But the vacuum cleaner works much better, lots of junk in the bin and on the floor looks great and doesn't see any junk flying around. So for me it's a thumbs up. Stick to the original that can prove the value of Hepa if you have such health problems. I'm not the type to risk my life to save a few bucks.