The first Hydro “Original Fins” were developed over 24 years ago. The Original Fin introduced the revolutionary V-Rail which increased surface area and in-turn maximised the thrust of each kick. The fins symmetrical design eradicates leg twist motion allowing longer surfs and less strain/injury to the user. Combine all this with its comfortable foot pocket, and it's no wonder waterman all over the world have been choosing to use Hydro Fins for decades.