Abstract: A shoe sole and heel construction includes a midsole having a cavity formation therein opening at an outsole-facing surface thereof and lined with a thin perforated liner sheet. The cavity formation may include metatarsal and heel cavities and a restricted recess extending therebetween. The liner sheet covers not only the cavity walls but also portions of the outsole-facing surface immediately surrounding the cavity formation. An outsole is hermetically attached to the outsole-facing surface for closing the cavity formation to form a chamber formation with air at atmospheric pressure trapped therein. The outsole may also have a cavity formation therein which cooperates with the midsole cavity formation to define the chamber formation, and the outsole cavity formation may be congruent with the midsole cavity formation.