The Rapid is a recreational Monofin designed for teenagers and adults. Using a large single-blade, swimmers will learn a proper undulation in the water and obtain a great core and leg workout. The Rapid's flexible blade makes swimming more enjoyable as users can swim at greater speeds and depths. A versatile Monofin, the Rapid can be used in a pool, lake or ocean and comes with an adjustable heel strap. The Rapid also comes with squeeze-style quick release buckles on the foot straps that provide added safety in the water. Build leg and core while dolphin kicking activates utilize 60% of your muscle mass, including the core and lower body. Stability ridges on the fin are built for proper flexion and speed. Monofin comes with plastic protection insets that maintain comfortable foot pocket shape during storage. The Monofin has a 24" x 21" (61cm x 53.34cm) natural rubber blade. A great product for swimmers looking for fun or a healthy workout, the Rapid comes with a signature of approval from Olympic gold medalist, Pablo Morales.