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Funny new monofin

Thread Status: Hello , There was no answer in this thread for more than 60 days.
It can take a long time to get an up-to-date response or contact with relevant users.
I've never used it before but I notice that c4 puts that bump-out on a lot of their fins (not just the monofin). I'm assuming, as they are a pretty well respected company, that it must work pretty well. Certainly looks funny though.
 
I'm guessing extra efficiency through extra flex. The extension gives some more surface-area that wouldn't be restricted by the stabilizing ridges.
 
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