Looking at a pair of the KSO myself, looks like good kite field wear for my style.
I have three pair of Fivefingers and wear them a LOT!!
WARNING: KSO which stands for Keeps Stuff Out do NOT keep out sand and they are HORRIBLE on the beach.
On the other hand, Classics have a bungee around the top that you can tighten up and are the best ones I have for keeping out sand.
Thought all y'all might wanna know