Shoe insert

Claim 1

A shoe insert, comprising: (a) an envelope of air impervious transparent thin plastic film material, said envelope, as seen in plan, tracing the outline of a human foot with a heel zone, a forward zone and an intermediate zone; (b) said envelope having upper and lower walls and a side wall joining said upper and lower walls; (c) said upper wall having in said intermediate zone a first hole therethrough of a first diameter and in said heel and forward zones second plural holes of a second diameter less than said first diameter; (d) an opaque pattern printed on the inside surface of said upper wall and defining with unprinted portions thereof the location of said first and second holes; and (e) a flat pad of cushioning foam material in said envelope confined between said upper, lower and side walls, said pad of cushioning foam material having in registry with said first hole in said upper wall a third hole passing therethrough and in registry with said second plural holes fourth plural holes passing therethrough, whereby as the wearer of said shoe insert walks and asserts pressure on said heel zone air is forced into said forward zone and expelled through said first hole in said intermediate zone and said second plural holes in said forward zone followed as said wearer asserts pressure on said forward zone by air being forced into said heel zone and expelled through said first holes in said intermediate zone and said second plural holes in said heel zone.