Maximum control in more terrain with XDR 78 ST. Its progressive rocker shape delivers a consistent, playful feel, and the lightweight set with Mercury 11 binding means more fun with less effort, from the first chair to the last. The basalt layer gives great power to weight ratio as well as giving outstanding dampening and vibration absorption. The rocker shape is Salomon's all-terrain rocker with camber for grip and raised tip and tail for float its a very versatile ski. It also has a titanium layer that gives the ski rigidity for edge grip and energy transfer.