FCS II Flow III Performance Glass Single Fin - Flux

A single fin designed for smooth, controlled, flowing turns.

The Flow fin is a single fin designed for smooth, controlled, flowing turns and classic longboard performance. Inspired by the iconic designs of George Greenough, this refined template suits surfers who prefer a more relaxed, flowing approach to longboarding.

With an elongated base for strong drive and a long curved tip for controlled turning, the Flow fin delivers smooth rail-to-rail transitions while maintaining the trim stability needed for extended nose rides.

What are the features and benefits?

• Wide base for strong drive and flow
• Thin tapered tip for turning sensitivity
• Higher sweep for longer, drawn-out turns
• Designed for smooth carving and trim stability
• Ideal for surfers seeking classic longboard performance

How does it perform and feel?

The Flow fin is designed for smooth, stylish longboarding with controlled turning arcs.

The wide base provides strong drive off the bottom, allowing surfers to generate speed and maintain flow through turns. Its higher sweep and curved outline promote long, drawn-out carving lines, while the thin tapered tip improves sensitivity when transitioning from rail to rail.

The result is a fin that feels stable when trimming, responsive during turns, and perfectly suited to flowing longboard lines, while still providing the stability needed for extended nose time.

What is the Fin Template?

Flow: Drive, flow, and smooth turning control.

The Flow template is designed for surfers who want a single fin that emphasises smooth carving turns, trim stability, and classic longboard flow. Its higher sweep and elongated base make it perfect for surfers looking to draw longer lines and maintain fluid style.

What fin box is this fin compatible with?

This FCS II longboard fin will fit FCS II Longboard Fin Boxes as well as other standard (US) longboard fin boxes.

What material is this fin made of?

Performance Glass (PG): For decades, solid fibreglass fins have been the preferred construction for many of the world’s best surfers. Performance Glass fins are CNC machine-cut from layered sheets of fibreglass and resin, producing highly accurate foils that are then hand-finished for precision and performance.

This construction creates a stiff, dependable flex pattern that maintains its integrity even under immense pressure, making PG fins ideal for powerful surfing. The result is a fin that delivers instant response, strong drive, and exceptional control when you push your board to its limits.