The ornamental design for a decorativehairretainer, as shown and described.
FIG. 1 is a isometric perspective view of the hair retaining apparatus comprising decorative elements decorative hair retainer, illustrating the apparatus with a stud decorative element, a flower decorative element and a hanging flower decorative element, which embodies my design;
FIG. 2 is a front perspective view of the decorative hair retainer;
FIG. 3 is a top perspective view of the decorative hair retainer; and,
FIG. 4 is a bottom perspective view of the decorative hair retainer.
The broken lines in the drawing are for illustrative purposes only and form no part of the claimed design.