These fins are designed by Kai Hopf and Nik Baker.
They are G10 construction which is extremely tough and hard to ding. Most G10 fins are very hard meaning they are not forgiving and it is easy to spin the board out. These ones have a flexy tip which allows for any mistakes in foot pressure.
The Fish Wave is a light wind wave sailing fin.
It is designed to give plenty of lift to get the board going in very light condition whilst not stiffening up the turning at all.
It is also a very grippy fin that can be relied on in the largest waves.
If you are slogging out and riding in, then this is your fin!
These are all US Box fins.