Abstract: A shoe comprising a sole with a plurality of check valves provided for discharging air from the inside of the shoe. The check valve having a microhole and a concave zone wherein the air is forced out the bottom of the shoe sole through the valves upon pressure exerted by the wearer.

Abstract: A shoe sole (A) comprising a fixed insole (B) provided with a series of holes, wherein there is provided a plurality of resilient hollow air chambers extending through the whole thickness of the sole, said chambers having an upper portion with hemispheric shape and circular plan which supports the fixed insole, and a lower portion forming the tread. The shape of such air chambers or spacers is similar to that of an igloo with a central hole (1, 1′) at the top. In order to perform a shock-resistant action there are provided conical protrusions (6) projecting from the base of each igloo towards the respective upper hole (1) so that when the walls (2, 5) are deflected by the user's weight, each protrusion (6) will occlude the corresponding hole (1) before all of the air contained in the igloo escapes.