| 摘要 |
In a helmet, a helmet body 1 has ventilation holes 3 formed therein, and a guard portion 2a is arranged outside the helmet body 1 so as to cover the portion thereof where the ventilation holes 3 are formed. The guard portion 2a has a gap 5 for ventilation secured toward the outer surface of the helmet body 1 and the ventilation holes 3.
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