Review on Get your Shark Navigator Lift-Away Vacuum Cleaners running smoothly with Green Label Brand 2 Pack Replacement Filter Kit XFF350 - Fits NV350, NV351, NV352, NV355, NV356E, NV356K, NV357, NV360, NV370, NV391, UV440, UV490CCO by Nicole Mcleod

Seems to work and fit well. I use it with no problems. would recommend. I haven't tried cleaning the filter to see if it cleans as well as the factory filter, but the price difference doesn't bother me. The foam appears to be a different texture than the factory filter but other than that there is no difference and the bottom pad is about twice the thickness of the factory filter but again this doesn't affect the fit of either or canister placement and blocking.