For example, the midsole may be composed of material such as polyurethane or ethylene vinyl acetate (EVA) and may include air bladders or gel-filled tubes encased therein, and the outsole may be composed of, by means of example only, an abrasion-resistant rubber compound. [0041] Rear sole support 140 is also attached to the heel region of upper 120 in a conventional manner, such as injection moldi