Voit Duck Feet Snorkeling, Bodyboarding, Bodysurfing & Diving Fins The Voit Fins have been a staple item at beaches from the early 50s. They are known as Duck Feet due to the long blade. Like all time-tested products they evolve with time. The legendary Duck Feet Swimfins is constructed from dual density 100% gum rubber with a soft rubber foot pocket & a stiff blade. Non-marking & full-floating, this fin is hydro-dynamically designed for greater propulsion with minimal effort.