Any of various materials, made from synthetic polymers, that have a cellular structure and are used in upholstery or insulation(noun)
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Use "polyfoam" in a sentence
"Yes, every single one of our businesses, I mean we know on Anodyne and American Furniture it's foam, which is a byproduct of polyfoam which is itself an oil-based product."
"She sat, and I lay, on a narrow rock terrace padded with a strip of polyfoam slightly thicker than the blanket."
"One of those stiff cheap polyfoam blankets covered me."