Kt Drifter Foil BoardKT Drifter Foil Surfboard What KT Surfing has to say The boards have a completely flat rocker where the foil is attached. The foil is 90 degrees to the board, when foiling it creates neutral lift. They have a nice entry for bouncing off the water and beveled rails to bounce off when you are in turns and hit the water. The tail bevel acts the same, allowing you to ride a longer board and yet the board will not touch down in the tail and hit as quickly.