The Skeleton Fish by Cole is ideal for, but not limited to, small to medium sized surf. The full outline, along with the single to double concave bottom allows for increased planning speed, acceleration and looseness. The tri fin design maintains the drive and carving power of the standard thruster. We have had great success with the double-wing swallow in this design. The double-wing swallow allows for extra width under the front fins for looseness, while also allowing for the tail to be pulled in for extra control and carving. These boars fly through flat spots, and allow the rider to find pockets of speed in even the most gutless surf.