Help Locations Returns ♡ Wishlist

Endorfins Twin + 2 (Single Tab)



Firewire Endorfins Twin + 2 (Single Tab)

The ‘Twin + 2’ is Kelly Slater’s latest addition to his ENDORFINS fin line – a Twin Fin set packaged with two separate trailing options for the thruster box.

 From Kelly: “I started surfing on twin fins and obviously as surfing transitioned in the early 80’s to thrusters, I went along with it. Over the years I have dabbled in twin fins, but only recently have I spent much time really refining board and fin designs for a performance twin. This fin design is what I settled on while wanting tight, in the pocket surfing and not the feeling of having too much fin.”  Setting this self-designed Twin Fin / Trailer combination apart from others in Kelly’s history is optionality - the two twin fins come packaged with two separate trailer options; the larger ‘Stabilizer’ trailer enables more drive and hold while the smaller ‘Guitar Pick’ trailer creates a freer experience, with less directional drive and more slide, second only to the uninhibited lateral freedom of surfing the Twin + 2 as a pure Twin Fin. Each trailer option can also be used together with any other fin set, for example the Stabilizer or Guitar Pick can be used in the thruster box of the KS1 Quad set. Regarding the Twin + 2 template shape and size, Kelly says he believes in “The smaller the wave, the larger the fin theory” describing the way that small wave surfing benefits from larger fins with high surface area, but as a fin designer, he’s also mindful of all-around performance, continuing that: “I wanted something that would also handle higher speed waves. This template provides me the best of both worlds, being enough in a small, flat wave (especially with the hybrid thruster trailing fin options) and not too much fin at higher speeds.”  The Twin Plus Two is at surf shops and online stores globally, and listening to Kelly, it sounds like this fin set will be an increasingly important part of his fin quiver in coming years. “Twin fin surfing requires a different approach to using the rail and pushing or holding back a touch on your turns and I believe it’s an essential board design for everyone’s quiver. I foresee myself spending more time in the remaining years of my surfing riding twin fins than traditional performance boards and it makes me excited for small wave surfing more than I’ve felt in years. “



  • AREA | 13500 MM SQUARED
  • BASE | 130 MM
  • HEIGHT | 137 MM


  • AREA | 4980 MM SQUARED
  • BASE | 99 MM 
  • HEIGHT | 75 MM


  • AREA | 2840 MM SQUARED
  • BASE | 98 MM
  • HEIGHT | 45 MM
Returns & Exchanges



We accept unworn, unused merchandise purchased from the Jack's Surfboards website in its original packaging with tags included for a refund of the product. Original shipping charges are non-refundable. You have 30 days from the delivery date to return your goods.


All Gift Card Sales are Final – No Refunds Or Exchanges

Shipping & Processing

Processing Time for orders shipping with ground or economy shipping is 1-3 business days. Orders placed with expedited shipping options and international orders will be shipped same-day or the next business day if placed after 12:00 pm PST.

Regular Jack's order fulfillment hours are Mon to Fri, 9 am to 5pm. We ship from our distribution center in Huntington Beach, CA.

Any orders placed on the weekend or during holidays will begin processing on the next following business day (excluding holidays)

Free Store Pickup

Now available at select Jacks. locations. Shop online and get your order fast at your local store. More Details


People Also Viewed


Recently Viewed