This lightweight and fashionable cloak has a highly decorative silver trim. When in a character’s possession, it adds a +2, +4, or +6 enhancement bonus to her Charisma score.
Moderate transmutation; CL 8th; Craft Wondrous Item, eagle’s splendor;
Price 4,000 gp (+2), 16,000 gp (+4), 36,000 gp (+6); Weight 2 lb.
Source: Dungeon Master's Guide