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. protective wear
8. helmets (protective wear)

Anotations

Scope note:

Casques intended for the protection of those flying aircraft. These were initially made of leather, were fitted to the head and had earflaps that were connected via a chin strap. Some were lined with fleecy material. More historically recent models are made from a variety of materials including fiberglass and plastic, and are more typically formed into a round dome encasing the entire head of the wearer.