FIG. 1 is a rear perspective view of a portion of a shoe midsole with internal channels showing my new design;

FIG. 2 is a side view thereof; and,

FIG. 3 is a front perspective side view thereof.

The uneven broken line immediately adjacent to the shaded area represents an unclaimed boundary of the design. Unshown portions of the midsole form no part of the claimed design. The uneven broken line showing of the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design.