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Cosmic Twin Fins Set - ST Box

Name: GONG - Cosmic Twin Fins Set - ST Box
Brand: GONG
SKU: GON25FINTWIFUTCOSWHB-S
Price: 82.0 CAD
Availability: InStock

The COSMIC twin fin set for Single Tab boxes.

See Description

$82

Type fiberglass

fiberglass

Taille S

S
M
L

Couleur WHITE AND BLACK

Screw for Futures Fin Box

Poncho Travel Light

BLACK

Surf Hat Sunguard UPF50+

Unique / Noir

            0
            -3

  qc 0
  ps -3
  iq 0
  mq 3

The product will be available from June 15, 2026

ref : GON25FINTWIFUTCOSWHB-S

Direct sale from shaper to surfer

Quality boards conceived in France

Pay in multiple installments

fins-twin Twin
fiber-glass-fin Fiber Glass
single-tab-box Single Tab Box

Details

Board type

Shortboard

Midlength

Longboard

Template

Upright

Neutral

Raked

Aptitudes

Drive

Pivot

Hold

Speed

Program

Description

Program

A powerful and stable twin fin designed to maximize drive, projection, and control in committed waves.

Overview

The Cosmic is a performance twin fin oriented toward power and stability. It stands out with a wide base, generous surface area, and a more loaded template than the more pivot-oriented models in the range. Where the Flash favors freedom and the Lunar focuses on balance, the Cosmic is clearly rooted in a logic of control and projection.

Its behavior becomes evident as speed increases. The fin generates constant drive, allowing the surfer to maintain momentum through long sections and efficiently regain speed out of turns. It provides a very solid hold on the face, enabling deeper engagement in turns without losing control. The board feels more stable and more “set” on its rail, while still preserving the natural glide of a twin setup.

It is the ideal fin for surfers looking for a twin that can fully exploit more powerful conditions.

Template

Performance-oriented twin upright template. The rake is moderate to slightly pronounced, favoring long lines and projection. It helps maintain speed through turns while stabilizing the trajectory.

Base

The base is wide, which generates a lot of drive and control. It allows the rider to absorb powerful turns and maintain speed on the line.

Depth

The depth is significant, providing excellent grip and high stability, especially in fast or hollow waves.

Surface area

The surface is generous, strengthening hold on the face and the ability to drive hard. It supports committed and controlled surfing.

Setup

The twin setup is a configuration that prioritizes speed, glide and freedom. With only two fins, the board generates very little drag, allowing it to accelerate easily and maintain a natural flow down the line.

The feeling is very loose and responsive: the tail remains mobile, rail-to-rail transitions are fast, and surfing is carried with a lot of fluidity. The board turns easily, with a “loose” feel that encourages fast lines and spontaneous maneuvers.

This is an ideal setup for fast, relaxed surfing, using the natural speed of the wave with maximum glide and freedom in line choice.

Technology

Our fins are manufactured from solid fiberglass panels, ensuring outstanding strength and long-term reliability. Precision CNC machining from solid material allows for highly accurate shapes that stay true to the original design, delivering smooth, consistent performance in all conditions. This process also makes it easy to develop different templates and fine-tune performance characteristics to suit specific needs.

The same construction method is used across the entire range, guaranteeing consistent flex patterns and feel between models. This proven manufacturing process provides excellent resistance to heavy loads and exceptional durability.

Highly resistant to torsion, impacts, salt water, and UV exposure, these fins maintain their performance over time while remaining easy to maintain and repair when needed.

Technical sheet

Cosmic Twin Fins Set - ST Box fiberglass / S / WHITE AND BLACK

Buying guide

Who is it for?

The Cosmic is aimed at powerful surfers who like to drive their turns. It suits intermediate to advanced riders. It is ideal for those surfing fast or solid waves who want to maintain control at high speed. It allows you to hold your line and push hard through turns. It requires physical commitment. This is a fin for powerful and stable surfing.

What is it for?

The Cosmic is particularly suited to performance fish and modern twin setups designed for fast or hollow waves. When combined with a trailer, it gains even more grip and precision, moving closer to a thruster-like feel while still keeping better glide.

What size?

Fin sizing mainly depends on the following factors:

rider weight
surfing style
board volume
surf conditions

A heavier or more powerful surfer will need larger fins to maintain enough surface in the water for grip and control.

A lighter surfer can use smaller fins to reduce drag and make the board more manoeuvrable.

Surfing style also plays an important role. A surfer who prioritizes quick turns and short transitions may choose slightly smaller fins for more reactivity. A surfer who drives hard through turns or surfs powerful waves will benefit from larger fins for more stability and projection.

In general:

Larger = more grip and control
Smaller = more speed and manoeuvrability

The more volume a board has, the more fin area is needed to control it.

Finally, conditions also influence the choice. In small or soft waves, slightly smaller fins help generate more speed.

In fast or hollow waves, larger fins provide more grip and security in critical sections.

In summary, the right size is the one that balances speed, control and manoeuvrability, depending on the surfer, the board and the waves being surfed.

Equipments

The set consists of two side fins (right and left).

It comes with a fin key for installation.

Delivery

Orders are prepared and shipped quickly: most are dispatched within 24 to 48 business hours.
The delivery time, meaning the transit of the parcel to your address, then depends on the delivery location and the carrier.
Shipping costs are transparent and calculated based on weight, volume, and delivery address.

View all our delivery FAQs.

Exchanges & Returns

You have a 14-day right of withdrawal to return or exchange a new product that does not suit you.

View our returns FAQs.

Eco-Responsible Packaging

We prioritize sustainable, recyclable, and reusable packaging solutions, minimizing single-use plastic as much as possible while ensuring optimal protection for products, including large items.