The Positive Drive Fins are unique from any other short blade fin in your gear bag, as they allow you to complete a perfectly legal Breaststroke kick while you are wearing them. This gives a coach and swimmer a ton of flexibility in a workout. Now you can implement the explosive training power of fins right into a standard IM or breast set. They are particularly valuable during high-intensity IM work, as they allow the user to drive hard off of the walls and transitions, while maintaining the flexibility that is needed for Breaststroke kick. This versatile fin will send your next big swim to the next level.