Split-fin for propulsion with less effort The SF15 has added a single sheet of material with a different hardness to the side ribs of the fin to give it "stiffness." By generating more speed and power with less effort, it can now meet the demands of even more divers. ● Split-fin that moves with "lift" and "flow control effect" ● Efficient propulsion from small kicks to slow, large kicks ● Blade inclination angle that utilizes kicks without waste ● Fin strap & buckle for smooth attachment and detachment Size: XS-S Purchased and stored at home for a long time. It is new and unused, but there are some scuff marks, so please check the photos. *Additional photos can be provided, so please feel free to comment if you have any concerns! Thank you for looking.