polyfoam

[ pol-ee-fohm ]
/ ˈpɒl iˌfoʊm /

noun

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.

Origin of polyfoam

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020