| 摘要 |
PROBLEM TO BE SOLVED: To provide footwear in which dust is not accumulated and dirt is not clogged in vent holes and air permeability is kept at all times without increasing the diameter of the vent hole. SOLUTION: At a bottom part 1 composed of an upper layer body 11, a lower layer body 12 and an intermediate layer body 13, the plurality of vent holes 3 and 4 are respectively formed at the opposing positions from the front part to the rear part of the upper layer body 11 and the lower layer body 12, and an opening 5 facing the vent holes 3 and 4 on the rear part side among the vent holes 3 and 4 is formed at the rear part of the intermediate layer body 13. A center slit 6 is formed from the opening 5 to the front part, a plurality of branched slits 7 branched from the center slit 6 are formed at the positions facing the vent holes 3 and 4, and the vent holes 3 and 4 are made to communicate with each other by the branched slits 7. COPYRIGHT: (C)2005,JPO&NCIPI
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