Heeled footwear and method of producing heeled footwear

A heeled footwear comprising a sole assembly and a heel part, said heel part comprising an insert formed of a first material comprising a polymer substance, the insert comprising a core body delimited by an upper surface and a lower bottom surface placed opposite the upper surface and an outer surface connecting the upper and lower surfaces, the outer surface being a radial side wall of the insert, at least a part of the outer surface being enclosed in an outer material formed of a second polymer material different from the first material, the outer surface comprising a retention means extending radially outwardly from the radial side wall of the insert and configured to increase the retention between the insert and the outer material;

• wherein the outer material forms an outer contour layer of the heel part and the sole assembly comprises an outsole formed of the second material, said second material not covering the lower bottom surface and said second material being softer than the first material, and that the outsole and the outer contour layer are configured to be formed in one piece providing an outer sole unit being one component, wherein the second material surrounds the outer surface of the insert.