What is claimed is the ornamental design for a hair covering, as shown and described.
FIG. 1 is a rear perspective view of a hair covering, showing an embodiment of the new design.
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right-side elevational view thereof;
FIG. 4 is a left-side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines showing a person in FIGS. 1, 3-5 are included for the purpose of illustrating the invention in use, and form no part of the claimed design.
The stippled pattern shown in FIGS. 2 and 7 is representative of color contrast.