Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. organic material
7. elastomer
8. [elastomer by composition or origin]

Anotations

Scope note:

A class of elastomers that is notable for performance at low temperatures, resilience, and abrasion resistance. Used for shoe heels and soles, gaskets, and belting. Combined with other rubbers to improve their resilience and flexibility at low temperatures.