The short, stiff fibreglass blade of the Finis Shooter Monofin works wonders for competitive swimmers who want to improve their feet and ankle flexibility and develop a powerful, swift Butterfly kick. This training monofin is a great training tool to simulate race-pace kicking and tempo while working your abs, quads, lower back and glutes. The Shooter Monofin is also suited for long-distance breaststroke workouts, butterfly training and underwater backstroke drills.