The Spirit's Shield

The Spirit's Shield is an improved Cloak of Protection +1 and offers double protection. It is found in the Underground Passages of Candlekeep.

In-game description
"Cloak of protection +2: 'The Spirit's Shield'. This cloak is said to focus the energies of one's spirit into a force that protects him or her. Rumors of a vampire enslaved in the magical item are ever-present, but they are impossible to prove without destroying the cloak."