| 摘要 |
Ventilation system, in particular, for a shoe sole comprises an outer layer (10) of an elastic material, an air permeable inner layer (20) fastened to the outer layer, and a watertight but air permeable ventilating layer (30) located between the inner and outer layers. The outer layer is provided with slits (40) which oriented at an angle to the longitudinal direction of the shoe, and .remain closed as long as no external force acts on them
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