Firewire Slater Designs Endorfins KS1 Thruster Fin - Black

Developed by Kelly Slater, Endorfins surfboard fins represent the next evolution in fin performance, sustainability, and design. Constructed with innovative carbon inlays, Endorfins are engineered for strength and optimal flex while maintaining an ultra-lightweight feel—thanks to a core made from 90% pure air. The result is a high-performance fin set that quite literally floats on water, reducing the chance of lost gear and ocean waste.

Each fin features a distinctive circular mark, a modern nod to Kelly’s iconic branding, symbolizing flow and progression. More than just performance gear, Endorfins carry a deeper purpose—addressing ocean pollution with a “screw your fins, not your ocean” mentality. By using a screw-in system and floatable materials, these fins help reduce the environmental impact of lost and discarded surf hardware.

Backed by a partnership with Sea Trees, Endorfins are part of a greater mission to offset carbon emissions through ocean and rainforest conservation efforts across California, Africa, and Indonesia.

Order by 12pm Mon-Fri to receive same-day DISPATCH

Order after 2pm and receive next business day DISPATCH.

Our full shipping policy can be found here

Free returns are granted if you receive an item that is faulty, or is not as described.

We do not cover return fees if you change your mind or order incorrectly.

We only accept returns to us within 14 days of date of receiving, in the condition that you received it and we will happily exchange it or issue a refund. *Conditions Apply.

PLEASE NOTE: Sale items are offered at significantly discounted prices so please choose carefully as we WILL NOT offer exchanges or returns on sale items.

Full return policy can be found here

We want you to be happy with the product you buy, so all our products offer a 12-month repair and replacement warranty for factory defects or manufacturing errors.

All warranty claims and repairs must only be assessed by the manufacturer and/or manufacturer's representative and will be repaired, replaced, or credited at their discretion excluding any shipping fees.

A valid proof of purchase will be required for all warranty claims.

Contact us on support@welcomeboardstore.com.au or call 039781472 for more information.