(under subclass 181.2) Head coverings in which a unitary head-engaging member is provided with at least one channel in that face adjacent the head, said channel extending substantially perpendicularly to the plane of the opening for the head.
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182.5, for head coverings having a spacer positioned between a head-contacting member and a crown, said spacer having channels in a face thereof extending substantially perpendicularly to the plane of the opening for the head.