The ornamental design for a headwear with underside netting, as shown and described.
FIG. 1 is a perspective view of a headwear with underside netting shown in a position of use;
FIG. 2 is a right side elevational view of the headwear with underside netting;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a front elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is top plan view thereof; and,
FIG. 7 is bottom plan view thereof.
The broken lines showing the body on which the headwear with underside netting is positioned in FIG. 1 assist in illustrating how the claimed design may appear when worn and form no part of the claimed design. The finely incremented broken lines within the bounds of the headwear with underside netting represent stitching of the headwear with underside netting and form no part of the claimed design.