A natural or synthetic material in the form of a resilient mass. It may be bulk material or may be molded or cut to predetermined dimensions; bound with any suitable material, such as elastic; used to protect items against vibrational shocks, impact shocks, and abrasion, for filling in packaging, and for absorbing liquids from containers broken in transit. For corrugated items, see fiberboard, corrugated. Excludes insert, packaging. Do not use if a more specific item name is applicable.