FIG. 1 is a perspective view of a protective cover for a rearview mirror showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a right elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a perspective view illustrating use of the protective cover for a rearview mirror, the phantom lines being for illustrative purposes only and forming no part of the claimed design.

The protective cover for rearview mirror is shown on a reduced scale in FIG. 8.