Not all fins are created equal. While it’s true that all fins are designed to make you move faster through water, freedive fins are designed to create the maximum amount of thrust from each kick. This means that you can travel further with less energy. Freedive fins are typically longer than standard fins and may use any number of innovative features to accomplish this. Rails that channel water down the fin blade or using advanced materials such as carbon fiber are just a couple of examples of these features in action. By using less energy a diver is able to move faster, more quietly, conserve oxygen, and increase the time they can spend under water before having to return to the surface to breath.