This design is geared toward explosive, back-footed surfing. It features increased entry rocker and a modest tail rocker. A slight single concave flows into a double concave through the fins, and the bottom contours end with a slight vee off the tail. The low tail rockervee combo was incorporated to create added drive off the bottom while maintaining looseness in the tail block. The JM-F can be tailored for small, average, or overhead conditions. Available in a squash, swallow, or a round-pin tail.