Swimming Flippers are specifically designed for pool use and for swim training but can also be used for recreational swimming and snorkeling. The short blade is made of a highly reactive and light material that guarantees agile and effective kicking while not tiring out your legs. The blade length has been researched and studied by Cressi to ensure perfect muscle training without causing cramps or discomfort. The foot pocket is made from soft rubber elastomers, and is comfortable on foot, even during long swimming sessions. Designed for pool training and building muscle Highly reactive and light material for maximum comfort without tiring your legs Anatomic foot pocket Helps body motion and position as well as a racing technique Features of Swimming Flippers Soft Swimming Flippers are used to create a highly comfortable foot pocket with a superior anatomically computer-developed shape that keeps the fins comfortable even after extended wear.