Made with UV Resistant,, 100% Recycled,, Medical Grade Polycarbonate,Fits in standard FCS,, Probox and Dorsal fin boxesnFlexRez (XR) has been formulated to allow exceptional flex characteristics while still supplying desired memory properties. Its advantages over other fin materials include stiffness, a more positive flex pattern (nice tip flex, little base flex) and remarkable flex memory. The precision of the injection moulding process ensures the highest accuracy in geometry in each fin produced. This template, like the FlexLite? Quad sets are known for exceptional drive and flexibility has Dorsal's own UV Resistant (Hybrid) Polycarbinate material that while transparent adds maneuverability and all around performance. PRODUCT INFORMATION Engineered with flex tip technology, these fins combine superior performance with reduced weight. This allows the FlexRez? Quad fin increased drive and the ability to draw out longer arcing turns. A rigid base combined with a tapered flexible tip results in a progressive flex pattern, for quick rail transitions and forgiving performance even in the sketchiest situations. Fits in standard FCS and ProBox fin boxes and like the ENVY? line is made from recycled material.