What is the Praetor suit made of?

What is the Praetor suit made of?

UAC REPORT FILE: HGFLTGTV Some incantation tablets, and an ancient combat suit which was given a name: the ‘Praetor Suit’. When found, it was encased in an inscribed stone tomb. The suit was extracted from the rock, cleaned, and subjected to numerous tolerance tests, and found to be almost impervious to any damage.

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