It’s the SNAP
It’s the SNAP, in response to your kick that moves more water behind, faster, than you can kicking any other fin.
fin efficiency
US Navy Study Efficiency of Best Fins
SEAL Team members, Air Force Pararescue (pictured), Special Operations Combat Divers prefer Pro Model Force Fins. Summary of US Navy Sponsored Research on Fins Following are actual results of US Navy sponsored studies on efficiency
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