Crimson Chain

Crimson Chain is an enchanted chainmail +5. It offers an armor class of 0. It has the same protection modifiers as normal chainmail. This item appears in Baldur's Gate II: Shadows of Amn. It can be bought from Ribauld in the Adventurer's Mart in his special stock.

In-game description
"The dark red metal used to make this chain is said to come from a hidden mine in the Cloudpeaks. At one time the Bloodway, a band of evil adventurers, all wore armor of this kind, but the other suits have long been lost."