Raptor uses an advanced design and combination of materials to create the highest performance splitfin in its class.The Raptors design including the Whale Tail foot pocket for maximum energy transfer,delivers the maximum thrust and efficiency in the split fin category.These unique, patented buckles are the most simple and easy to use buckles available in the market. It only takes one quick movement to easily open or close the buckle, even when wearing thick neoprene gloves. The double button release prevents the buckle from accidentally opening.The open heel foot pocket is designed to accommodate dive boots with a sole, and to offer excellent adherence between the boot and the foot pocket in order to transfer all the force exerted by the leg to the blade, without sacrificing yield yet still ensuring superior comfort. The lower section of the foot pocket is longer, in order to better transfer power to the blade and minimize the risk of cramping. In addition, the inside of the foot-pocket features internal ribbing to improve fit and stiffen the sole.