Here's the Tech Specs page, which is slightly more hidden: https://www.apple.com/iphone-duo/specs/
Notably, the inner screen has a nano‑texture finish (which Apple normally upcharges significantly for), which implies it is glass.
in the keynote they explicitly said it was a polymer. Apple materials technology is really good, but it's not "folding glass" good.
in the keynote they explicitly said it was a polymer. Apple materials technology is really good, but it's not "folding glass" good.