The ornamental design for a belt for sling, as shown and described.
FIG. 1 is a front view of the belt for sling of the present invention passing through a channel in a sling;
FIG. 2 is an enlarged front view of the straps of the belt for sling of the present invention passing through a channel in a sling;
FIG. 3 is a front perspective view of the belt for sling of the present invention passing through a channel in a sling, with one end of the belt for sling folded over to show the backside of one pad; and,
FIG. 4 is a front perspective view of the belt for sling of present invention passing through a channel in a sling, with opposite end of the belt for sling folded over to show the backside of the opposite pad.
The phantom lines and areas shown in the figures, including those lines representing stitching, are for illustrative purposes only and form no part of the claimed design.
The straps connecting the pads are of no appreciable thickness.
The pads are partially shown in FIGS. 1, 3, and 4 for convenience of illustration.