Awesome fins!
"Perfect combo for firewire boards."
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An upright fin set with incredible pivot, designed by 11x World Champ, Kelly Slater. Single Tab variants are compatible with Futures' fin system.
A better build – innovative carbon inlays add strength and flex that enable them to be built with a core comprised of 90% pure air. As a result, these not only provide optimum performance but also literally float on water.





Overall rating: 4.9 / 5 from 10 reviews.
Review topics: [].
"Perfect combo for firewire boards."
"I’ve tried a bunch of fins in my Album Vesper and after giving these a go, I’m very happy to say they are staying in permanently. Have had them in for months now in a variety of wave conditions and they work really well in everything. I’ve had this board for a couple of years and have always loved it, but these fins made it even better. Drive, pivot, very lively. I’m 180 pounds and prefer the medium set."
"Love these fins, super fast, great drive and pivot especially exciting in the quad"
"Make me feel like Kelly, but I want to be like Andy. . ."
"Very well constructed fins. However, the quad rears for the large template (which I ride) are the same size as the quad rears for the medium template, even though the other fins increase in size from the medium to large set. For me, this means that the quad setup does not provide enough hold when doing powerful, back-footed turns, especially on the backhand. I didn't realize this until after I purchased and used the fins, so I'm unable to return them. I plan to purchase other, larger quad rears to use instead."
"These fins are awesome! Thruster and Quad in one? hard to beat that value! Was struggling to find the right setup for my Cymatic and the quad config totally unlocked the board! Tried the thruster setup on my shortboard and it felt great. Love how light the fins are - boards feel great under-arm with the fins in."
"I've used a quad set up for many years. The Endorfins Immediately felt different than the other fins I have used in the past. I felt these pins could accelerate the board and have a lot of drive yet, I was still able to pivot very quickly on the wave off the bottom turn annd then off the top turn. I found that could also pump the board faster on backside than in the past with normal quad fins. I'm so happy with the KS1 fin set I will buy another set for my other board. Make sure you use the installation screws on each fin because they do not snap into the fin box."
"Purchased June 2024 in Hawaii Just bought because no Demos from any surfshop until recently Best fins yet !!! Years ago surfshop employee said customers dont like them - i took her advice cause it looks like Blakstix 2. 0 - thought they were gonna feel soft -- i fell innlove with the Blackstix 3. 0 (stiffer version) and needed a large size cause im fatter and slower now. Tried the Endorfins KS. 1 and it feels like the Blackstix 3. 0 not 4. 0 and its fantastic - first wave instant turbo boost but with the benefit of faster upright pivot and release off the lip -- if i had bought these years ago when they were released i probably wouldnt have gotten fatter and slower -- Thanks Kelly for messsin with my emotions and getting into my head again"
"tight is right! They are feather weight and feel great!"
"The best daily fins, work well In all conditions and has a great flex. Perfect fins and I'm scared to try my other fins as the endorfins work so well. I used it as a quad and thruster"