| 摘要 |
<p>A shoe sole provides in the thickness of the sole a plurality of check valves for discharging air inside the shoe which are made of resilient material and are provided each with a microhole connecting the inside of the shoe with the outside, such valves being formed of a membrane provided with a concavity which is directed towards the perforated fixed insole and beneath which a hollow space or chamber is formed which communicates through its lower side with the outside reaching the tread.</p> |
