The invisible high performance technology - PE is a superior alternative to regular PU(Polyurethane Polyester). PE combines a polyurethane foam core with high-grade timber stringer, which is laminated using fiberglass cloth and a high quality epoxy resin. Haydenshapes opts to use Epoxy resin, PE construction for three key reasons. One, the optically superior brightening ingredient significantly enhances the whiteness of the board. Two, our exclusive epoxy is more flexible than polyester and maintains the lively flex pattern typically associated with a new board. Three, it's better than PU. It is more technical to manufacture and the result in the performance of this construction speaks volumes. In keeping with Hayden’s design philosophy of creating innovative and performance surfboards made from only the highest quality materials, the PE construction is lightweight, delivers cutting-edge flex response and speed, and feels remarkably sensitive under your feet.