Kick up the way you train. Enhance your up-kick with the Speedo Speed Training Fin. Designed to strengthen hamstrings and generate power for backstroke, freestyle and butterfly kicks. Short blades of this swim fin are designed for propulsive force while maintaining kicking tempo. Vents allow water to pass through promoting optimum speed and a six beat kick. Fin curvature creates pressure on the up-kick, promoting strength training. Comfortable open heel allows for increased ankle flexibility and easy transition to swimming fins during training. Available in a range of sizes for any size swimmer (S–XL). The Speedo Speed Training swim fin is a must for any serious swimmer that wants to greatly improve their up-kick.