| 摘要 |
A protection mask is provided comprising a flexible hood having a head opening for placing said hood over the head of a wearer, said hood being made of transparent plastic for allowing the wearer to see through the walls thereof, means for gathering the head opening of said hood around the neck of the wearer, said hood having an inhale opening in the walls thereof located in the vicinity of the mouth of the wearer, filtering means covering said inhale opening for filtering air entering through said opening, and check valve means through the walls of said hood for allowing air to exit from said hood when the wearer exhales and for closing when the wearer inhales outside air through said filtering means.
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