| 摘要 |
An article of sports footwear has a resilient plastics material chamber (24) received within the heel and has a valved air inlet (27) communicating through airflow channels (18) in a midsole unit and perforations (15) through an insole with the interior of the article, and a valved air outlet (28) communicating with the exterior, so that varying foot pressure during locomotion causes the volume of the chamber to increase and decrease thereby pumping stale air from the interior to the exterior. <IMAGE>
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