HemiPleat® eXtreme media offers significant filtration efficiencies over other nanofiber brands due to a proprietary media technology. Without nanofiber the base media is simply a depth loading media, but once nanofiber is applied it is now surface loading which drastically increases the efficiency and provides better dust release.This technology allows us to use our standard base materials, adding the two additional layers without compromising the pressure drop of our combined materials. This technology also insures a better bond of eXtreme fibers to its base over standard nanofibers on the base substrate.