The ornamental design for a hand covering, as shown and described.
FIG. 1 is a front perspective view thereof;
FIG. 2 is a front view thereof;
FIG. 3 is a second front view thereof;
FIG. 4 is a second perspective view thereof;
FIG. 5 is a third front view thereof; and,
FIG. 6 is a fourth front view thereof.
The even-dashed lines represent portions of the article and form no part of the claimed design. The dash-dot-dot-dash lines depict a boundary of the claim and form no part of the claimed design.