Evasive? They literally discussed the layers of materials, with the outer being a polymer.

They went in pretty extensive detail for the internal parts of the folding screen?

They talked for several minutes on the materials and engineering that went into the screen and how it wasn't "the same plastic all the other folding phones are made of"

Modern foldables use ultra-thin glass (UTG). There’s a factory-installed screen protector layer on top which can make it feel plasticy.