Firewire Slater Designs KS Twin+2 Fin Set

Kelly Slater isn’t called the greatest of all time for nothing—and he’s proving it again with the Endorfins KS Twin + 2 fin set. This setup is a total game-changer for twin fin lovers and surfers who want to experiment with twin fins or twin fins with trailers. But here’s the kicker: Kelly’s genius comes in the form of not one, but two trailers! It’s the perfect setup for testing Kelly’s fin theories on your own boards.

As we all know, Kelly loves experimenting with fin setups. Whether it's twin fins, trailers, stabilizers, or knubsters, he's always pushing the limits—and now you can try out his innovative ideas yourself. Designed and tested by the 11-time world champ, the Endorfins KS Twin + 2 fin set features groundbreaking carbon inlay technology. The result? A fin with incredible flex and strength while maintaining a core that’s 90% air—making it lightweight and responsive, so light, in fact, that they float!

No other twin + trailer fin setup on the market offers you the versatility of a stabilizer or knubster, so you can really dial in your ride to perfection.

These fins are compatible with the Futures fin system, so they fit just like your regular Futures fins. Just pop them into the box, screw them in with the single grub screw at the top, and you’re ready to go!

Kelly’s focus on this project has two key goals: First, to improve fin construction for better performance and response; and second, to make them eco-friendly. These fins are made with a Carbon Fiber Twill, combined with a non-woven carbon veil and a recycled PET core. This thoughtful blend of materials gives you a flex pattern that allows for more control and hold the harder you push, with excellent bounce-back when exiting fast turns.

By using recycled materials and a secure screw-in design, Kelly’s goal is to reduce fin loss and increase longevity. Plus, the lightweight design means they float, so they’re less likely to fall out of your board. You’ll have these fins for years to come.

In short, Kelly Slater has knocked it out of the park again. These new fins combine performance, durability, and eco-consciousness, and they’re going to make a lot of surfers very happy. Don’t wait—grab yours today!