We claim the ornamental design for a non-slip shoe protector, as shown and described.
FIG. 1 is a front perspective view of a non-slip shoe protector showing our new design;
FIG. 2 is a left side elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a back elevational view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a top plan view thereof.
The fuzzy material shown on the straps of the non-slip shoe protector forms a fastening closure. The fuzzy material shown on the bottom of the non-slip shoe protector forms a non-slip surface.