You can call them fins or scuba diving flippers. They are worn on the feet of a Scuba Diver to aid in swimming on the surface and below the water. Today's scuba diver has multiple styles to pick from.
Modern high tech swim fins are a real miracle of engineering and physics of maneuvering underwater. Using worldly mathematics and C.A.D. (Computer Aided Design) techniques, many models of fins give little comparison to the traditional paddle or full blade scuba diving flippers. The strongly angled or split fins were made to produce the most effectiveness and slide the scuba diver through the water with minimal expenditure of energy, therefore adding to the diver's bottom time. The best indication of how good a scuba fin works is not its design or efficiency, but its comfort -the best designed scuba fins won't get you very far if you are not comfortable using them.
Whether the every day full blade or paddle style, or the more progressive cut out designs, no matter what the design, scuba fins are fundamentally split into these two categories, "Full Foot" or "Open Heel. The Full Foot scuba fins fit onto the foot like a booty or shoe, "open heel" close with with a rubber strap around the heel after the foot is slipped inside. Many scuba divers pick the open heeled models for their versatility. They allow you to wear them with in addition to other foot accessories like boots, making them usable through a larger range of diving conditions. If diving in warm water, and will not need to wear boots, then the full foot flippers may be a more appropriate choice, they are a little tighter fitting, and lighter then open heeled fins, and take less energy to maneuver. Full Foot scuba diving flippers are used more often by those who snorkel.
Numerous scuba divers prefer the normal paddle or full blade scuba diving flippers, even these have evolved since their start, being manufactured from newer and more adaptable materials. The principal way how a fin works is the proportion of its blade the larger the blade the added thrust but the more strength you will run through to advance it. Most new styles of fins, maximize push and decrease energy usage by slashing vents into the blades, changing angles, or splitting the blade. The split blade is very famous of the modern inventive designs. The split scuba diving flippers also called bio-fins, dramatically benefit the power of a single kick, and can reduce the quantity of kicks required to encompass comparable distance making use of a traditional fin. Alternative new designs in scuba diving flippers fashion vents into the blades in addition to the splits, that oust water out with each kick, thus these scuba fins work more like a propeller than a paddle.
Which ever type of fins you choose you should always verify them out for fit and comfort in a pool first, before taking them out to the open water. A satisfying fitting pair of effective scuba diving flippers is a piece of apparatus all scuba divers should own, and will help you get a kick out of scuba diving.