Crazyfly Razor Fins now come in Blue for high-visibility on any board. This is an especially nice option in areas it's hard to see your board when you fall off. And even more useful if your board is dark-colored or black. Razor fins are a very high-density Dupont-brand Polymer, and the result is a very thin fin that literally slices through the water. Less drag, less cavitation around the fin, lighter weight, and flexibility make these the most high-performance twin-tip fin on the market. Blue makes them highly-visible.