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 Free Ride - Super Cross is a big sail (6.0+) freeriding fin.It is early planing with a very comfortable top end and is very forgiving in choppy water.These fins are great for blasting around and making the most of light conditions.They are all Power BoxCheck out our new fin buying guide here to get the right fin for your board and your sailing.