Wearing a reliable pair of snorkeling fins can make a huge difference when swimming. They help swimmers conserve energy to overcome drag and maximize thrust. Snorkelers can choose between open-heel and full-foot fins. The length of the fin blade can also have a significant impact on the workout underwater. Short blades, for instance, create greater resistance that challenges swimmers to use a greater kick. Longer fins, on the other hand, are ideal for beginners who want to improve ankle flexibility and leg endurance.