The FCS GMB is Matt "Mayhem" Biolos"s signature template. It has a lively combination of drive, hold and maneuverability. The Glass Flex materials have been formulated to replicate the flex and memory properties of hand laid fiberglass. Its advantages over other composite 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.