Learn to Dolphin Kick with the Finis Foil Monofin This monofin teaches the "Foil Body Motion" developed and made popular by coach Bob Gillett.The "Foil Body Motion" utilizes the whole body to create a powerful and undulating dolphin kick through the water. The Foil Monofin promotes an equal use of upwards and downwards kicks for propulsion throughout the entire dolphin kick movement. This increases both core and leg strength The natural rubber the monofin is made from provides a secure and comfortable fit. Features SmartFin™ Technology - Combination of blade angle and hydrodynamic vents for a more natural kick style. Single Blade Design - Promotes development of the undulating Foil Body Motion and propulsive dolphin kick. Technique Channels - Controls the flex of the fin and encourages correct foil movement. Large Surface Area - Works core and leg muscles more than standard fins. Open Heel and Toe Design - Increases range of motion, open toe space for a more comfortable fit. Lightweight Construction - Comfortable to wear for all ages and abilities. Lightweight Blade - Allows multiple swimmers to safely swim in a single lane. Natural Rubber - Provides a secure and comfortable fit. Comparison Table