Swim at faster speeds with Sprint Floating Fins. Constructed with long, hydrodynamic blades for enhanced propulsion, these hard rubber fins help you move smoothly through the water while swimming, as well as promote strength in your leg muscles. Sprint Floating Fins have a soft heel design for added ankle comfort. Ideal for use in open water and pool training, these aquatic fins will not sink. Available in junior sizes: 8-11 and 11-13. Adult sizes: 1-3, 3-5, 5-7, 7-9, 9-11, 11-13 and 13-15.