The JW was designed with one thing in mind, Dynamic Soaring. Joe Wurts designed the airfoil to maximize the speed and performance of Dynamic Soaring with an EPP wing. This plane has the torsional strength to withstand the high speeds achieved while DS'ing. Now you can have the performance of a composite plane with the durability of an EPP plane. DS'ing is not all it can do. It is a fast and fun plane to fly on the front side of the slope too!