The ornamental design for an outdoorsman's mitten, as shown and described.
FIG. 1 is a perspective view of an outdoorsman's mitten showing the design in a position of use;
FIG. 2 is a bottom perspective view of an outdoorsman's mitten shown in an alternate position of use;
FIG. 3 is a top plan view of the outdoorsman's mitten showing the design;
FIG. 4 is a first side-elevation view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a second side elevation view thereof;
FIG. 7 is a front elevation view thereof; and,
FIG. 8 is a rear elevation view thereof.
The broken lines showing the chair, tree stand, tree trunk and human figure represent environmental subject matter intended to illustrate how the design may appear when in a position of use and form no part of the claimed design. The strap hardware ring, the cuff-like feature and the tubular strap on the underside of the mitten shown in broken lines illustrate features of the article of manufacture that form no part of the claimed design. The broken lines that occur on the claimed design itself are lines of stitching and form a part of the claimed design.