Fins Endorfins KS1 Kelly Slater Medium 5 Fin

Slater Designs KS1 Futures Fins – Vertical Power, Engineered by an 11x World Champion

The Slater Designs KS1 Futures Fins were developed by Kelly Slater himself — a vertical fin set designed for sharp, pivot-heavy turns and unmatched control in critical waves. Compatible with the Futures system (Single Tab), this is Kelly’s go-to configuration for powerful, precise surfing.

Wave Type
This is Kelly’s original fin setup: a vertical template built for tight direction changes and quick responses. It excels in hollow waves and critical pockets, perfect for surfers who prefer a direct, fast, and controlled style.

Fin Characteristics
Optimized for maximum pivot, the KS1 features a vertical outline for precision surfing. Our team frequently uses the quad rears from this set in combination with other front fins to test new sensations and fine-tune performance.

Advanced Construction
Built with innovative carbon layers for enhanced flex and durability, each fin features an advanced core made of 90% pure air — making them ultra-lightweight, naturally buoyant, and engineered for high-end performance.

Compatibility: Futures (Single Tab)
Template: Vertical / Pivot
Ideal For: Tubes, critical turns, high-speed control
Construction: Carbon fiber with 90% air core
Flex: Responsive with refined rebound

Built to perform when it matters most — straight from the mind of a surfing legend.