National Geographic Marlin 50 Open Heel Fins updated

National Geographic is synonyms with adventure, and the Marlin 50 Open Heel Fins-Explorer Series is your key to unlocking the adventures of the water world.Fin is constructed of three different materials to achieve the appropriate thrust-to-energy exertion ratio. This composite design maximizes snap and flex of the blade. Soft and comfortable foot pocket with adjustable open heel allowsuse of the fin for extended periods of time with or without additional foot protection. Fin straps are replaceable, and are equipped with Ratchet Quick Lock (RQL) buckles.