Con-caved, Planing Surface Speeder. Domestic Bliss with a Twist This is the most excited I have ever been about a small wave surfboard.” ~ Matt Biolos This board, features a concave bottom that transitions to vee in the tail. The wide outline makes for easy wave catching and down the line glide and stability. The concave bottom adds lift and increased rail curve, which allows radical top to bottom surfing. The straight rail line & vee in the tail keep the board moving forward and hold in during hard carving manoeuvres.