The the Cressi - sub Frog open heel dive fin was the original fin from Cressi to incorporate the ` Blade Along the Pocket ` design .
The the Cressi - sub Frog open heel dive fin has been one of the most famous fins for over 10 years .
The the Cressi - sub Frog open heel dive fin was the original fin from Cressi to incorporate the ` Blade Along the Pocket ` design , and has been one of the most famous fins for over 10 years .