We claim the ornamental design for a sock cover, as shown and described.
FIG. 1 is a side view of a sock cover showing the new design in an in-use configuration;
FIG. 2 is a front perspective view showing the design of FIG. 1 in an in-use configuration; and,
FIG. 3 is a rear perspective view showing the design of FIG. 1 in an in-use configuration.
The appearance of the opposite side portion of a sock cover showing the new design, a portion of the claimed design which is not illustrated in the drawing disclosure, is a mirror image of the appearance of the front and rear portions (as the ornamental design pattern repeats across the sock cover surface). The appearance of the interior surface of a sock cover, a portion not illustrated in the drawing disclosure, is unclaimed. The broken lines appearing above the sock cover illustrate environmental structure and form no part of the claimed design. The broken lines showing the remainder of the sock are for environmental purposes only and form no part of the claimed design. The remaining broken lines have been included for illustrative purposes only and form no part of the claimed design.