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Problem

Humans are very inefficient swimmers, converting only 3-4 percent of our energy to forward motion
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Solution

This fin has a unique design which allows you to increase your swimming speed drastically
It was inspired by dolphins and sharks

The Lunocet provided Michael Phelps with 349% more propulsion, allowing him to swim 87% faster than his 2009 World Record!
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Users have already hit about eight miles (13 kilometers) per hour, nearly twice as fast as Olympic Gold Medal swimmer Michael Phelps at his speediest
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You won't escape a shark

It might be helpful for free divers, divers, Underwater Hockey players, scientists (hydrobiologists)...