By Sharperimage.com

Finis, Inc. Rapid Monofin

The Rapid Monofin are designed for adults and teenagers who are swimming enthusiasts. The large flexible single-fin lets you swim at greater speeds and depths, plus provides a great core and leg workout under water. Can be used in a pool, lake or ocean and comes with adjustable heel straps. Available for men's shoe sizes (8-12) or women's shoe sizes (9-13). It also features a quick-release foot strap that provides added safety in the water.