I claim the ornamental design for a face shield, as shown and described.
FIG. 1 is a rear perspective view of a face shield as worn by a user;
FIG. 2 is a rear perspective view of the face shield depicted in FIG. 1;
FIG. 3 is a front view of the face shield depicted in FIG. 1;
FIG. 4 is a rear view of the face shield depicted in FIG. 1; and
FIG. 5 is a left side view of the face shield depicted in FIG. 1, the right side being a mirror image thereof; and
FIG. 6 is a top view of the face shield depicted in FIG. 1; and,
FIG. 7 is a bottom view of the face shield depicted in FIG. 1.
The dashed broken lines shown in FIG. 1 depict a user's head and are provided for the purpose of illustrating environmental structure only. The dash-dot-dash broken lines shown in FIGS. 1 and 2 depict a strap and are provided for the purpose of illustrating environmental structure only. No subject matter depicted in any of the aforementioned broken lines form part of the claimed design.