These are the NEW Genesis Coronado Open Heel Snorkeling Scuba Diving Fin These great fins feature: Open heel design for comfort and use with dive boots Lightweight durable blade - optimized length to width for scuba application Quick release buckle and adjustable strap for easy donning Flex limit feature allows blade to be easily shaped during kick for correct position to generate thrust Large blade surface allows for maximum thrust Now available for 2011, these great new fins are perfect to take on your next dive!