A soft velvet bag. If you put this bag over one's head it eliminates all sensory input, allowing greater introspection and mental focus. Gives advantage on all Wisdom and Intelligence rolls, but gains the conditions blinded and deafened, and automatically fails any roll that requires sight or sound. 

Notes: Advantage: Intelligence Ability Checks, Advantage: Wisdom Ability Checks, Blinded, Deafened, Buff, Cursed