Product descriptionThe RC4 Z13 is our best selling Fischer race binding and its easy to see why, it covers such a wide range of racer. You can be just progressing from an intermediate into advanced, a real hard pro racer or simply a racer that has the weight that matches the binding. The highest din these will go is 13, if you have a din that exceeds this then take a look at the Z17. Fischer RC4 Z13 FREEFLEX Race Department