The Rapid monofin is a recreational monofin designed for teenagers and adults. The large single-blade teaches swimmers a proper undulation in the water, while obtaining a great core and leg workout. The Rapid's flexible blade makes swimming more enjoyable as users can swim at greater speeds and depths. The Rapid is a versatile monofin that can be used in a pool, lake or ocean and comes with adjustable heel straps that can be fitted to various sizes. The Rapid also comes with quick-release foot strap that provide added safety in the water.