S10 The S-10 is a high performance, all around destroyer. When surfing is all you can think about, the one tri-fin to have on hand to make it all happen is the S-10. Calculated, almost robotic, open face cutbacks and precision, lightning fast snaps are where this board comes alive. This is the travel board, contest board and daily driver for Nat Young. Recommended for neutral to back footed surfers, fast vertical surfing and any wave where you can throw the tail.