This is all about raw-unconstrained speed. With a slightly wider base and a tight curve back into a straight-up twin fin with a Sting on the Tail. The straight-up twin allows for a sharp pivot point to go hard off the bottom, and the Sting on the Tail is the cut-off tip right at the end of the fin, which allows you to get that little extra bit of release when you want to drift the tail just a little more in a carve or off the top re-entry.These Twins can be used in a modern fish design and allow range into your more performance-based twin fin boards.