The Sea Juice XFM Design has a carbon fibre base and a thin foil adding more flex, for a back fin in a thruster set up.
It has increased tip area with a swallow tail that creates a forward thrust, similar to the fastest fish in the ocean.
A medium size back fin designed for surfers 45kg-88kg+.
HEIGHT: 4.87" / 123 mm
BASE: 4.62" / 119 mm