I claim the ornamental design for a half face mask with neck cover, as shown and described.
FIG. 1 is a left-side elevation view of a half face mask with neck cover showing my new design.
FIG. 2 is a front elevation view of a half face mask with neck cover showing my new design.
FIG. 3 is a bottom plan view of a half face mask with neck cover showing my new design.
FIG. 4 is a right-side elevation view of a half face mask with neck cover showing my new design.
FIG. 5 is a top plan view of a half face mask with neck cover showing my new design.
FIG. 6 is a rear elevation view of a half face mask with neck cover showing my new design; and,
FIG. 7 is a perspective view of a half face mask with neck cover shown in use.
The broken line showing of a portion a person's head and neck in FIG. 7 is included for the purpose of showing the environment of the half face mask with neck and forms no part of the claimed design.
The dashed lines on the trim and the zigzag lines on the mask represent conventional stitching.