Abstract: In an athletic shoe, a system for conveying air into the shoe in which an air reservoir in the resilient outsole assembly is open to a first transverse air channel which opens in turn to the surrounding air, a longitudinal air slot in the outsole assembly is open to the air reservoir, a first vertical hole in the top of the outsole assembly is open to the air slot and to a second vertical air hole in the insole board, the second vertical hole in turn is open to an air channel in the bottom of the slipsole, and the slipsole air channel is open to third vertical holes in the slipsole which open into the inside of the shoe under the user's foot; the air reservoir, air slot, first air holes and second air holes can lie on the midline of the sole assembly; and the slipsole air channels can be arranged in a grid covering the entire bottom of the slipsole with the first air holes, second air holes and third air holes arranged at the intersection points on the grid.

Abstract: Outsole for a shoe including a first sole component molded of a relatively dense natural or synthetic rubber composition and having a cut-out shank region and a second sole component of a relatively less dense organic plastic material filling the cut-out shank region of the first sole component.