A nice and stiff glass fin with Hex core for reduced weight, and carbon strips add strength as well as drive with out detriment to weight. 

This is an all-round fin that works well in all conditions.   Suitable for most kitesurfers and board shapes.

Kitesurfers size guide is generally one size smaller than for surfers
For kitesurfers
Extra Small : suitable for kitesurfers 50-65kg
Small : suitable for kitesurfers 65-80kg
Medium : suitable for kitesurfers 75 - 90kg
Large : suitable for kitesurfers over 90kg