With its short and stiff fiberglass blade the FINIS Shooter Swimming Monofin builds a quick and powerful butterfly kick. At the same time this swimming monofin helps improve flexibility in the feet and ankles. This swimming monofin is recommended for swimmers ages twelve and above. It allows the swimmer to race kick speed while working their abdominal muscles lower back quadriceps and gluteus. The Shooter Swimming Monofin from FINIS is a useful tool for performing underwater drills breaststroke technique and butterfly conditioning. It is designed to simulate race pace kick tempo and develop power in your kick. Performing the butterfly stroke for longer periods is now easier without suffering from stroke decay with the help of this swimming monofin. The Finis Shooter Swimming Monofin is recommended for use when performing the butterfly breaststroke some arm recovery drills backstroke underwater work and swim starts and turns. Choose from a variety of colors and sizes for a perfect fit.