Dive Fins: 5 Fast Facts

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Fact #1. Flexible swim fins were invented by a Lieutenant Commander in the French Navy. He spent roughly two decades refining his propulsion device before he registered for a patent in 1933. He was far from the first to tinker with the idea of using foot extensions to push through open water. Some of the greatest innovators of the 19th Century, like Benjamin Franklin, had experimented with the idea before.
Fact #2. The goal of dive fins is to allow a swimmer to move quicker and more efficiently while underwater. This is especially important for ocean divers. They use a great deal of energy to reach considerable depths within an abbreviated period of time.
Fact #3. Swimming with fins is easy. It will also lighten the burden on your body. The most basic motion is what is known as a flutter-kick. Flutter-kicking requires the same one-two motion that person uses whenever kicking in a swimming pool. The difference is that both arms should remain static, and positioned at your sides.
Fact #4. The most important aspect of any pair of fins is comfort. This may come as a surprise given that so much priority is focused on performance. Yet, the reality is that if a pair doesn't fit comfortably, that pair is of little value, long-term. One-size-fits-all models tend to cause blisters, or pinch the heel, or cram the toes, or, worse yet, slip right off. Any fins that are fastened with a strap should include some extra padding along the back.
Fact #5. You'll want to get a sense of how durable a pair of fins might be before purchase. This is tricky, in that the majority have been designed by using a similar combination of rubber and plastic. Seeing phrases like multi-layered, reinforced, and structural integrity in a description is a promising start. You'll probably also want to read some professional reviews, and customer reviews, before you make your final choice.