The planar board disclosed features a convexo-concave board characteristic that allows the boards to channel the water creating a water rail for smoother more controlled performance. The planar board also features one removable cross member end that allows for collapsibility quickly and conveniently with out the aid of tools. The collapsibility allows for easy storage. Each board member also features openings therethrough the side of each board which are pressure increasing holes pulling the board in a more defined manor. The distal end of each running board member has a groove that acts as a vacuum release allowing the board to run smoother freeing the board from drag resistance for better performance. Disclosed is a planar board that incorporates collapsibility with convexo-concave characteristic, a vacuum release characteristics and a pressure opening feature giving a faster water displacement response and water rail effect producing a higher riding; smoother performing planar board.