Footwear Midsole

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