The idea behind the Torsion Spring is to create a one piece hull where the left side talks to the right side with dynamic flex without losing kinetic energy from the wave. This core gives you the quiet, smooth, feeling of a polyurethane board but the lightness of an EPS board. Fully waterproof, if you get a small ding, you don’t have to worry about ending your session. The Carbon Kevlar tape used along the rail in this 3D perimeter reinforced construction resists buckling. The way it wraps onto the top of the tail in the fin zone frees the tail up and provides extra rebound out of turns. Biaxial cloth is used to increase compression resistance without noticeably affecting the flex.
With EPoly, it's what you can't see that matters. EPoly construction is a traditional PE polyurethane blank glassed with Epoxy. With all the emphasis on “new technologies” in regards to surfboard cores, glassing techniques, carbon, etc., that is going on in the marketplace today we offer a simple glassing technology that provides surfers with a better product that performs at a higher level and extends the life of the surfboard for a minimal additional cost.