DESCRIZIONE
Heel member for an open-heel fin, comprising a loop-shaped body (1; 3) with a substantially parabolic profile, such that its inside takes the form of a cavity (101; 103) with a substantially parabolic profile and suitable for housing the ankle of the user, which is provided, on both of its arms (201; 203), with at least one axial duct (211; 213; 223) suitable for the housing of the strap (2) for the coupling with the sides of the foot pocket of the fin. [Image Omitted]