Firewire Endorfins Slater KS1 2-Tab 3 Fin Set Black-White M
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Endorfins Slater KS1 fin set, built to float
The Endorfins Slater KS1 is a 3 fin set built with a 2-tab base, and it is the fin set behind a lot of the searches for Endorfins fins and the KS1 fin set specifically. What sets it apart from a standard fin is a core comprised of 90% pure air, reinforced with innovative carbon inlays that add both strength and flex.
What makes the build different
- Carbon inlay construction for added strength and flex
- Core comprised of 90% pure air
- 2-tab base compatible with either two tab fin boxes or single tab fin boxes
- 3 fin set configuration
Because the core is mostly air rather than solid material, these fins literally float on water rather than sinking, on top of delivering the performance the carbon inlay construction is built for.
Fin box compatibility
The base on this set works like a Futures fin with a Futures base for two tab or single tab fin boxes. If you are running an FCSII compatible base, note it requires two screws that come included with the fins, and FCSII compatible bases on Endorfins will not click in and click out the way a Futures base does.
Who it is for
This set suits surfers who already know they want the drive and predictability of a 3 fin setup and who value gear that will not add to the fin debris left behind in the ocean. Since these fins float rather than sink if lost, they are easier to recover and less likely to end up as reef trash.
Branding and the eco story
The circle on the side of each Endorfins fin represents flow, a new take on the circular branding that has appeared on every fin Kelly Slater has endorsed, honoring that history while building toward what comes next. The brand's eco commitment centers on screwing fins into surfboards rather than losing them on the ocean floor, and Endorfins works to offset the yearly carbon footprint of its fin production by conserving kelp forest, protecting rain forest, and planting mangrove trees.
Why buy from Island Water Sports
Island Water Sports has stocked surf hardware for the South Florida surf community since 1978, and we carry Endorfins because a fin set that floats and holds up to real surf conditions is exactly what our customers need. Shop the Slater KS1 3 fin set online or in store.
Free Shipping, No Minimum for IWS Beach Club Members.
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Specifications
- Brand
- Endorfins
- Product
- Firewire Endorfins Slater KS1 2-Tab 3 Fin Set Black-White M
- Gender
- Unisex
- UPC
- 5607790023506
- MPN
- FINK-KS1-3F-2-M-BKWH
Frequently Asked Questions
- What are Endorfins fins made of?
- Endorfins use carbon inlay construction around a core comprised of 90% pure air, which adds strength and flex while letting the fins float on water.
- Do Endorfins fins float?
- Yes, because the core is 90% pure air, Endorfins fins float on water rather than sinking if lost.
- Is the Endorfins KS1 fin set compatible with FCSII boxes?
- The base works with two tab or single tab fin boxes similar to a Futures base; an FCSII compatible base requires two included screws and will not click in and click out the way a Futures base does.
- Why does the Endorfins fin have a circle logo?
- The circle represents flow, a new take on the circular branding that has appeared on every fin Kelly Slater has endorsed.
- Is Endorfins an eco-friendly fin brand?
- Endorfins is built around screwing fins into surfboards rather than losing them to the ocean, and the brand works to offset its yearly production carbon footprint through kelp forest conservation, rain forest protection, and mangrove tree planting.

