Shoe has air inlets in upper part of heel which connect with pouch which feeds air through channels in upper surface of sole and out through perforations in insole

摘要

The shoe has air inlets (21) in the upper part of the heel. These are connected to a pouch (4) which feeds air through channels (12, 13) in the upper surface of the sole (2). The air then emerges through perforations (31) in an insole (3).