Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Costume (hierarchy name)
5. costume (mode of fashion)
6. [costume by function]
7. masks (costume)
8. face masks

Anotations

Scope note:

Masks that contain one or more ancillary masks inside the former, usually through interior panels or separate halves. Wearers use strings and levers to open up these other masks when performing. Commonly made and performed by Native Northwest Coast communities at various events such as potlatches.