FG Lost Single Fin 6.25"The Evil Twin by Lost Surfboards is a free thinking, transformational toy for the post modern retro surf world. A fully convertible mash up between Twin fin flamboyance and Single fin flair. We worked with Lost to develop the 6. 25 performance Sinister Single Fin specifically for their Evil Twin model. Use them in conjunction with any one of Futures Side Bite options, to create the ultimate transformational fun machine and expand your horizons beyond