The FCS II Retro Performance Glass Keel Twin Fin Set features a low aspect keel template built for fish shapes with modern outlines and concaves. It has the lowest area keel in the range, delivering a fast and loose feel with minimal drag while supporting a more progressive and radical approach to riding a fish. Machine cut from solid fiberglass, the Performance Glass construction provides stiffness and consistent flex under high force and demanding conditions, and is designed to fit the FCS II Fin System for use across fish, funboard, and twin fin boards.
Fin Size Detail
Size
Height
Base
Area
Sweep
Foil
S-M
4.73"
7.28"
22.58"²
38.3°
80/20
Product Info
The FCS II Retro Performance Glass Keel Twin Fin Set features a low aspect keel template built for fish shapes with modern outlines and concaves. It has the lowest area keel in the range, delivering a fast and loose feel with minimal drag while supporting a more progressive and radical approach to riding a fish. Machine cut from solid fiberglass, the Performance Glass construction provides stiffness and consistent flex under high force and demanding conditions, and is designed to fit the FCS II Fin System for use across fish, funboard, and twin fin boards.
Fin Size Detail
Size
Height
Base
Area
Sweep
Foil
S-M
4.73"
7.28"
22.58"²
38.3°
80/20
Product Details
Fin Type: FCS II
Size: S-M
Fins in Set: Two
Fin Configuration: Twin (Keel)
MPN: FRKXPG
Product Construction
Performance Glass (PG)
Performance Glass (PG) Construction characteristics and flex pattern are identical to traditional Fiberglass fins offering a stiff base with subtle responsive tip flex, amazing aesthetics and proven durability. PG fins are the perfect transition fin for surfers moving from fixed fins to the convenience, accuracy and performance of FCS.
Warranty
This product is backed by a warranty from the manufacturer. Click below for details on the warranty policy for FCS II products.
FCS 1-Year Limited Warranty
FCS offers a 1 year limited warranty against manufacturing defects and faulty workmanship. Please note that this does not include damage caused by misuse, inappropriate use or normal wear and tear. Loss of fin where there is no fault identifiable by the fin box is also not covered by our limited warranty.
FCS will not be responsible for any costs, losses or damages incurred as a result of loss or use of product. All warranty claims must be made at the place of purchase or directly with FCS. Proof of purchase (receipt with date of transaction) is essential for all warranty claims.
* All FCS moulded composite fins are designed to break at the tabs when subjected to vigorous impact. This design feature aims to protect the integrity of the plug installation, and help prevent damage to the surfboard.
Faulty Products
Faulty items will be exchanged for new items within 2 weeks of receiving the product. If this product is not available, we will gladly exchange for any items to the same value or issue a refund. Either way you will be contacted by customer service to determine what is best for you.
FCS will happily cover the cost of shipping your new product.
If you are not 100% satisfied with your purchase you may return it for a refund, or exchange within 30 days of receiving your order.
Cleanline Surf General Return Policy
Holiday Returns
For any orders placed after Nov 1st, 2025, we have extended our normal 30-day return policy to allow returns through January 31st, 2026.
Returns are easy! We understand that in some situations returns may be necessary. We also want you to be stoked on your purchase. If you are not 100% satisfied with your purchase you may return it for a full refund, within 30 days of receiving your order. Items must be in new condition with original tags and packaging.
Please refer to our full Return Policy for more details.
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