Snowboard Arbor Draft 2019/20 Specifications System Rocker - rocker deflection that is more pronounced in the center of the board. At the tip and heel, the rocker is reduced, the so-called Parabolic Rocker for maximum performance at higher speeds, arc cutting and landing. Grip Tech - sidecut adds contact points under your feet, ensuring a more ergonomic way of adhering to snow when needed. At the same time it forms contact points on the toe and heel for easier and more natural