PC Racing Flo-X Filter - Shroud L PCYZSF Best performing filter you can buy, and the most convenient Main filter incorporates a bonded two layer precision foam and proper density for maximum performance and filtration Comes with 2 built-in foam Filterskins to make the task of cleaning the filter as easy as peeling off the dirty Filterskin! It is like having 3 filters in one, and you dont even have to loosen the wing nut to remove the Filterskin With 3 uses out of one FLO Air Filter, they are more convenient and economical than replacing with a cheap disposable filter even if you just threw it away after one use