🏊♀️ Dive into Performance with Every Kick! Sculpted side rails enhance hip rotation and downkick drive for powerful propulsion. Midfoot flex points eliminate cramping, letting you focus on your swim. Increase your kick cadence while maintaining perfect technique. Experience a revolutionary 10º blade angle for unmatched stability. Extended foot pocket designed for ultimate comfort during long sessions. maximized propulsion 100% natural rubber 10º blade angle The Speedo Unisex Adult Swim Training Fin Switchblade is crafted from 100% natural rubber and features a unique 10º blade angle, designed to enhance stability and propulsion during your swim training. With an extended foot pocket for comfort and midfoot flex points to prevent cramping, this fin is engineered for serious swimmers looking to elevate their performance.