Arm Sleeve Pillow

FIG. 1 is a top perspective view of an arm sleeve pillow, showing my new design; FIG. 2 is a front elevation view thereof; FIG. 3 is a rear elevation view thereof; FIG. 4 is a top plan view thereof; FIG. 5 is a bottom plan view thereof; FIG. 6 is a left-side elevation view thereof; and, FIG. 7 is a right-side elevation view thereof. The broken lines shown in the drawings depict the bounds of the arm sleeve pillow that form no part of the claimed design.