I actually have two Shark Navigator Lift-Away vacuums, and was in dire need for replacement filters for the both of them. The filters are washable, which is nice, but they do take some time to dry and I don't want to have to wait that long to use my vacuum cleaners. This replacement set allows me to switch a set so that I can wash the others without having to wait on dry time. I hadn't cleaned my filters in quite a while, so putting in these new ones really affected my vacuum in a postitive manner. The suction seemed to be a lot better. I also added a few drops of essential oil (saw this on a different review) and it really does make the room smell nice.