It's interesting to note that, as far as our research could tell, Tolkien doesn't describe the armor part at all ... Sauron few even of the great among Elves and Men could endure." ...

Lord of the Rings' Sauron, the Dark Lord, has a frightening shape under his armor that many fans have yet to see.

J.R.R. Tolkien's The Lord of the Rings novel ... responsible for the mining of mithril and the resultant armor that sprang from it, the Elves created items imbued with special powers.