The Futures Fins Twinzer is a unique fin set up that creates a Twin Fin feel with added thrust and smoothness rail to rail. The Twinzer is a large T1 Twin fin side fin with a Twinzer Canard that directs water flow into the larger foil. Note: You must have a C5 box installed in your board to take advantage the Twinzer Canard. Great for summer flat spells, the Futures Fins Twinzer will keep you surfing!