Futures Fins x Stacey EN Fibreglass Twin Fin SetFutures Fins x Stacey EN Fibreglass Twin Fin Set Futures EN Fibreglass Twin Keel Set The EN Fibreglass Twin is Future's xtra large sized twin fin, offering that classic twin fin feel. Its a versatile option for multiple board designs that throwback to the 70s and early 80s. The fibreglass material combined with a wide base and extra tall height gives this fin maximum drive, while the thinner tip allows for just the right amount of flex for