Soft, flexible, and comfortable enough to log countless hours in the pool, Kiefer Training Swim Fins are essential for swim workouts and swim training.A perfect training tool for kicking, swimming drills and training sets.A short and curved blade fin improves kick efficiency and develops kick strength without overtraining muscles, allowing swimmers to focus on proper kick mechanics.Swim fins are colour coded for quick sorting and perfect fit.They are a great choice for swim teams and aquatic facilities.Kiefer - The First Name in U.S.Swimming since 1947.