| 摘要 |
An article of footwear is constructed to dynamically provide width adjustment by cooperative expansion and contraction of a longitudinal split midsole with an expansion element integrated with an outsole that allows the midsole to expand from a narrow width to a wider width. The upper of the shoe has a corresponding section that can expand to a similar degree as the midsole and outsole to enable the volume of the upper to increase proportionally to the width of the sole.
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