Dive Fins For Scuba Versus Snorkeling Dive fins provide the necessary propulsion to move you more easily in the water and free up your hands for other activities when you’re diving. If you’re having trouble sifting through some of the variations of dive fins out there, read our handy guide so you can make an appropriate choice. Dive fins come in two basic types – the full foot fins and the open heel fins. Dive Fins | Mares Fins | Mares Diving Fins | Scuba Diving Fins |