polyfoam

American  

[pol-ee-fohm] / ˈpɒl iˌfoʊm /

noun

1. a rigid, semirigid, or rubbery foam composed of minute bubbles of air or carbon dioxide embedded in a polymer matrix, often polyurethane: used in mattresses, padding, insulation, etc.

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Etymology

Origin of polyfoam

poly- + foam

Example Sentences

He said Orr had dropped an incendiary device in polyfoam at the hardware store, just as his alter ego had in the novel.

From Los Angeles Times • Jan. 29, 2025

The makers of the Eve aim to set it apart from the mid-priced competition by adding a separate “cooling layer” between the top memory foam and lower supportive polyfoam.

From Slate • Aug. 29, 2018

I slept on polyfoam padding, which was damp and after a while stank.

From Time Magazine Archive