some say that Hermes loaned Perseus a helmet of invisibility as well. Also known as the helmet of darkness, this was the same headgear that Hermes himself had worn when he vanquished the giant Hippolytus. This was on the occasion when the gargantuan sons of Earth rose up in revolt against the gods of Olympus.
Hermes' symbol of office as divine messenger was his staff, or caduceus. This was originally a willow wand with entwined ribbons,traditional badge of the herald.