The DORSAL Transition longboard surfboard fins seamlessly connect turns and allow surfers to move up and down the board. This versatile fin is designed for all conditions and combines drive speed and response for modern longboarding. The Transition Longboard Surfboard Fin is our best model if your looking for a great sweeping fin designed with a rigid glass flex in the first truly retro material. This fin is the futures answer to longboarding and SUP.