I didn’t know until the other day that you can actually get scuba fins that are split in to. Vertically, of course….
What’s the point in that? Another marketing ploy to part you from your cash? Maybe, maybe not.
Apparently, they allow divers to get the same amount of speed, with less effort. Less effort means that you use less oxygen and can therefore stay underwater for that bit longer.
Whether they actually do as they are supposed to or not is still a matter of debate, but boy. do they look cool!