These Mad Wave Swim Fins have been engineered to improve your leg muscle strength which in-turn improves your swimming speed and performance over long and short distance swimming The long blade of the Mad Wave Swim Fins promotes a slow, strong kick which is essential for beginner swimmers allowing you to practice at your own pace whilst the the swim fin enforces a correct body alignment and feet positioning. Without swim fins you will find your muscles will get overworked and therefore you will be unable to maintain a fast pace for a long period of time, by wearing long blade fins like these you will be able to kick faster and for longer than ever before. Fin swimming will not only improve your leg strength, but will also improve your cardiovascular strength giving you long-term performance gains This fin can be used by all levels of swimming to boost cardiovascular conditioning and accelerate speed during workouts, but we highly recommend them to beginner swimmers or for those needing a kick with added propulsion such as those engaging in scuba diving or snorkeling. Features: Build Leg StrengthTrain your legs muscles for increase speed speed and endurance Longer BladePromotes long slow kicks which is essential for beginner swimmers. Closed Heel DesignCreates a comfortable and secure fit which inhibits hyper-flexion(tearing or deformation of posterior ligaments) Blade AngleThe Long Fin blade aligns with the natural angle of the foot, promoting a proper kick Ankle FlexibilityIncreases flexibility and range of motion for a more free and efficient swim kick Positive BuoyancyThese swim fins aid your floating helping to give confidence and reassurance to beginners 100% Natural RubberLong lasting and durable