The concave deck surface brings your center of gravity closer to the water and provides ridges to place your feet against for more control. The concave bottom surface creates a single-hull, catamaran-like board with increased stability and unparalleled balance, especially handy in choppy conditions.
The rails are thicker, providing a recessed feel and limiting the surface area on the bottom for faster glides. The middle section is thinner, offering more control and stability.