Speedo Switchblade Swim Fin

Highly satisfied with these fins. I am a retired Masters swimmer and water polo player, and use these fins for lap swimming 3,000 yards, 3x per week year round. The fit is very comfortable for my foot size and shape (size 10.5 feet, fin size L), and have never worn sores into my heel or toes. The fin design provides for just the right amount of kick speed, thrust, and flex for my workouts. Like all rubber fins, they do eventually wear out (in particular, where the foot sandal meets the fin at the toes), but I am happy with the amount of time each pair has lasted, given the amount of use.