Footwear Midsole

FIG. 1 is a front perspective view of a footwear midsole showing my new design; FIG. 2 is a front view thereof; FIG. 3 is a rear view thereof; FIG. 4 is side elevational view thereof; FIG. 5 is an opposite side elevational view thereof; FIG. 6 is a top view thereof; and, FIG. 7 is a bottom view thereof. The broken lines in FIGS. 1 - 7 represent portions of the footwear that form no part of the claimed design. The dashed lines which define the bounds of the claimed design form no part thereof.