Futures F-Series. Looking for a go to set of fins? The F-Series fins are exactly that. Designed with a midrange balanced Ride Number, these fins share the perfect blend of speed generation & speed control. Ranging from the F2 in the x-small category all the way up to the F8 in large, the F -Series provides every size surfer with a trustworthy option for your everyday surf session. If you've had trouble selecting a fin, this is a great place to start!.....Ride Futures