Cressi Palau Open Heel Fins

"The Palau Long Adjustable Fin, Opens the way for a new type of snorkeling and swimming fin. It has been designed for two specific purposes. The first was to have a foot pocket that could easily adapt to at least three or four consecutive foot sizes. Great comfort and an ease of fit in a strapped open heel fin even if it is to be worn with bare feet. The result is a fin that is extraordinarily practical, that adapts to practically any foot size, and that allows for very quick fitting in any situation."