The FCS CI Upright PC Large Black Thruster Fins are a Channel Islands collaboration fin set designed for speed and tight turns — a template that comes alive in punchy, hollow beach break and delivers the start-up speed needed to get going in less-than-perfect surf. Built in Performance Core polycarbonate construction for a fast, responsive feel at Large size for bigger surfers.

• Template: CI Upright — designed with Channel Islands for speed, tight turns, and explosive vertical surfing in punchy conditions
• Construction: Performance Core (PC) — injected polycarbonate for a stiff, responsive, fast-reacting feel
• Size: Large — recommended for surfers 165+ lbs who want speed and tight turning ability in powerful surf
• Colorway: Black
• Best Conditions: Hollow, steep beach breaks and punchy surf where start-up speed and tight turns are priorities
• Board Compatibility: Performance boards with deep concaves and moderate-to-extreme rocker
• Fin System: FCS II — tool-free installation
• Set includes: Left, right, and center fin

Sizing Note: CI Upright PC Large suits surfers 165 lbs and over on performance shortboards in punchy beach break. Medium-frame surfers should consider the Medium size.

Care: Rinse with fresh water after each session. Store away from direct sunlight and heat to prevent warping.