The ornamental design for a shoulderpad part of a baby sling, as shown and described.
FIG. 1 is a perspective view of a baby sling showing my new design including an infant holding part formed of both low elastic and high elastic knitted fabric, the shoulder pad part formed of both low elastic and high elastic knitted fabric and a belt part formed of low elastic knitted fabric integrally knitted together to form an annular shape;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof; and,
FIG. 4 is a reference view showing the baby sling in use.
The broken line portions of the figure drawings are included to show unclaimed subject matter only and form no part of the claimed design.