We worked hard to design a fin that could be both fast and also turn. Our 3SW offers a combination that no other fin can. The template, and outline, of the 3SW combined with our revolutionary K4 Super Stiff material makes for unrivalled performance. In bump and jump conditions you have speed and control. In down the line conditions you have grip and carve. Used in the RRD FSW board the K4 3SW is a truly great fin and will perform in any conditions.