Futures Fins Christenson Fibreglass Twin Fin SetFutures Fins Christenson Fibreglass Twin Fin Set The Christenson Twin is a proven template designed for modern twin fin applications. Its a pivot style template with an oversized base. This allows for good drive and speed down the line, while maintaining great release off the top. This fin adds a performance feel to your modern twin Template Category Pivot (tight turns loose) Construction Fibreglass Size Large Twin