2025/26 Season Fin Guide with logo of a surfboard brand.

lost mayhem

Here are our fin suggestions to match with some of the more popular board brands on the market


White surfboard with black logos and a single stringer down the center.

lost MOD QUAD +

FCS II MATT BIOLOS TRI QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.

 


lost SABOTAJ +

FCS II MATT BIOLOS TRI QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.

 


lost RAD ZAPPER +

FCS II MATT BIOLOS TRI QUAD FIN SET

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Medium and Large.

 


A white surfboard with green logos and a central stringer.

lost ORIGINAL PUDDLE JUMPER +

FCS II MATT BIOLOS TRI QUAD FIN SET

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Medium and Large.

 


lost THE RIPPER ROUND +

FCS II MATT BIOLOS TRI QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.

 


lost QUIVER KILLER +

FCS II MATT BIOLOS TRI QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.

 


lost SUB DRIVER 3.0 SWALLOW +

FCS II MATT BIOLOS TRI FIN SET

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Small, Medium and Large.

 


lost RNF96 KINGFISH +

FCS II MR TWIN + 1 FIN SET

Mark Richard's famous twin template produces exceptional drive and speed.

The small stabilizer (centre fin) adds control whilst maintaining the freedom and manoeuvrability of a twin fin set-up.

Available in size M-L.

 


lost BIG RIG DRIVER +

FCS II MATT BIOLOS TRI FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.


lost THE RIPPER BLACK SHEEP +

FCS II MATT BIOLOS TRI QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.


Black surfboard with white logos and designs.

LOST 3.0 STUB THUMB DRIVER BLACK SHEEP +

FCS II MATT BIOLOS TRI FIN SET

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Small, Medium and Large.


lost 3.0 STUB DRIVER BLACK SHEEP +

FCS II MATT BIOLOS TRI FIN SET

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Small, Medium and Large.


lost RNF96 BLACK SHEEP +

FCS II MR TWIN + 1 FIN SET

Mark Richard's famous twin template produces exceptional drive and speed.

The small stabilizer (centre fin) adds control whilst maintaining the freedom and manoeuvrability of a twin fin set-up.

Available in size M-L.


lost PARTY PLATTER +

FCS II HARLEY QUAD FIN SET

  Harley Ingleby's signature quad set. Harley's XXL template delivers maximum speed and drive for powerful surfers.

Available in XXL.


lost driver 3.0 ROUND +

FCS II matt biolos

TRI FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.

 



lost driver 3.0 SQUASH +

FCS II matt biolos

TRI FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.

 



lost driver 3.0 +

FCS II matt biolos

TRI FIN SET

  The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.

 



lost rad ripper +

FCS II matt biolos tri-quad

Fin SEt

The FCS II Matt 'Mayhem' Biolos's signature template delivers a lively combination of drive, hold and manoeuvrability. This versatile fin will feel reliable out on the open face or tight in the pocket.

Available in Medium or Large.

 



lost 3.0 stub driver +

FCS II matt biolos

TRIFin SEt

The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.

 



lost the ripper +

FCS II matt biolos tri-quad

Fin SEt

The FCS II Matt 'Mayhem' Biolos's signature template delivers a lively combination of drive, hold and manoeuvrability. This versatile fin will feel reliable out on the open face or tight in the pocket.

Available in Medium or Large.

 



lost sub driver +

FCS II kolohe andino

TRIFin SEt

Kolohe Andino's signature fin delivers a lively mix of drive, pivot and tail release.

Designed for performing fast, explosive turns and airs on and above the wave.

Available in Grom, Small, Medium, and Large.

 



lost rnf 96 +

FCS II performer twin + 1

Fin SEt

Adaptable across super twin models, hybrids and performance shapes, the Performer Twin offers the foundations of the thruster (predictability & control) with the looseness and tail release that’s closer to the feel of a twin. 

Available in size S-M

 



lost puddle jumper pro +

FCS II matt biolos tri-quad

Fin SEt

The FCS II Matt 'Mayhem' Biolos's signature template delivers a lively combination of drive, hold and manoeuvrability. This versatile fin will feel reliable out on the open face or tight in the pocket.

Available in Medium or Large.

 



lost mr california twin +

FCS II mr twin + 1

Fin SEt

Mark Richard's famous twin template produces exceptional drive and speed.

The small stabilizer (centre fin) adds control whilst maintaining the freedom and manoeuvrability of a twin fin set-up.

Available in size M-L.

 



lost pisces +

FCS II matt biolos

triFin SEt

The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.

 



lost smooth operator +

FCS II matt biolos tri-quad

fin set

The FCS II Matt 'Mayhem' Biolos's signature template delivers a lively combination of drive, hold and manoeuvrability. This versatile fin will feel reliable out on the open face or tight in the pocket.

Available in Medium or Large.

 


White surfboard with black logos and a single stringer down the center.

lost MOD QUAD +

FCS II matt biolos

Tri QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.



lost SABOTAJ +

FCS II matt biolos

Tri QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.



lost RAD ZAPPER +

FCS II matt biolos

Tri QUAD FIN SET

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Medium and Large.



lost ORIGINAL PUDDLE

JUMPER +

FCS II matt biolos

Tri QUAD FIN SET

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Medium and Large.



lost THE RIPPER ROUND +

FCS II matt biolos

Tri QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.

 



lost QUIVER KILLER +

FCS II matt biolos

Tri QUAD FIN SET

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.

 



losT SUB DRIVER 3.0

SWALLOW +

FCS II matt biolos

Tri FIN SET

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Small, Medium and Large.



lost RNF96 Kingfish +

FCS II MR Twin + 1

FIN Set

Mark Richard's famous twin template produces exceptional drive and speed.

The small stabilizer (centre fin) adds control whilst maintaining the freedom and manoeuvrability of a twin fin set-up.

Available in size M-L.

 



lost BIG RIG DRIVER +

FCS II MATT BIOLOS

TRI FIN Set

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.



lost THE RIPPER BLACK

SHEEP +

FCS II MATT BIOLOS

TRI QUAD FIN Set

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Medium and Large.

 



Black surfboard with white logos and designs.

lost 3.0 STUB THUMB

DRIVER BLACK SHEEP +

FCS II MATT BIOLOS

TRI FIN Set

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Small, Medium and Large.



lost 3.0 STUB DRIVER

BLACK SHEEP +

FCS II MATT BIOLOS

TRI FIN Set

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Small, Medium and Large.



lost RNF96 Black Sheep +

FCS II MR Twin + 1

FIN Set

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Medium and Large.



lost PARTY PLATTER +

FCS II HARLEY QUAD

FIN Set

Harley Ingleby's signature quad set. Harley's XXL template delivers maximum speed and drive for powerful surfers.

Available in XXL.



lost 3.0 STUB THUMB

DRIVER +

FCS II MATT BIOLOS

TriFIN Set

Designed by revered shaper Matt "Mayhem" Biolos. Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Small, Medium and Large.


lost DRIVER 3.0 ROUND +

FCS II MATT BIOLOS

TriFIN Set

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.



lost DRIVER 3.0 SQUASH +

FCS II MATT BIOLOS

TriFIN Set

Featuring a wide base, curved trailing edge and a tapered tip, this fin is primarily geared for performance power surfing. The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.



lost driver 3.0 +

FCS II matt biolos

Tri FIN SET

The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.



lost rad ripper +

FCS II matt biolos

triquadFIN SET

The FCS II Matt 'Mayhem' Biolos's signature template delivers a lively combination of drive, hold and manoeuvrability. This versatile fin will feel reliable out on the open face or tight in the pocket.

Available in Medium or Large.



lost 3.0 stub driver +

FCS II matt biolos

TRIFIN SET

The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.



LOST THE RIPPER +

FCS II matt biolos

tri quadFIN SET

The FCS II Matt 'Mayhem' Biolos's signature template delivers a lively combination of drive, hold and manoeuvrability. This versatile fin will feel reliable out on the open face or tight in the pocket.

Available in Medium or Large.



lost sub driver +

FCS II KOLOHE ANDINO

TRIFIN SET

Kolohe Andino's signature fin delivers a lively mix of drive, pivot and tail release.

Designed for performing fast, explosive turns and airs on and above the wave.

Available in Grom, Small, Medium, and Large.



lost rnf 96 +

FCS II performer twin +1

FIN SET

Adaptable across super twin models, hybrids and performance shapes, the Performer Twin offers the foundations of the thruster (predictability & control) with the looseness and tail release that’s closer to the feel of a twin. 

Available in size S-M



lost puddle jumper pro +

FCS II matt biolos

tri quadFIN SET

The FCS II Matt 'Mayhem' Biolos's signature template delivers a lively combination of drive, hold and manoeuvrability. This versatile fin will feel reliable out on the open face or tight in the pocket.

Available in Medium or Large.



lost mr california twin

+

FCS II MR TWin + 1

fin set

Mark Richard's famous twin template produces exceptional drive and speed.

The small stabilizer (centre fin) adds control whilst maintaining the freedom and manoeuvrability of a twin fin set-up.

Available in size M-L.


lost pisces +

FCS II matt biolos

TRIFIN SET

The bottom half of the fin produces exceptional power and drive, allowing surfers to push hard through turns while maintain a feeling of stability in critical situations. The tip, which narrows significantly from halfway up the fin, offers the freedom and agility to turn abruptly with confidence.

Available in Small, Medium and Large.



lost smooth operator +

FCS II matt biolos tri-

quadfin set

Sitting in the reactor family, the MB is considered a high performance fin because it responds incredibly fast, but still offers enough control so you can confidently lay into a turn with plenty of force.

Available in Medium or Large.



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