Holster

FIG. 1 is a bottom, front, right perspective view of a holster in accordance with our new design; FIG. 2 is a bottom, rear, left perspective view thereof; FIG. 3 is a top, rear, right perspective view thereof; FIG. 4 is a top, front, left perspective view thereof; FIG. 5 is a bottom view thereof; FIG. 6 is a top view thereof; FIG. 7 is a rear view thereof; FIG. 8 is a front view thereof; FIG. 9 is a right view thereof; and, FIG. 10 is a left view thereof. The dashed-broken lines depict portions of the holster that form no part of the claimed design. The dash-dot broken lines depict claim boundary limits and form no part of the claimed design.