In classical mythology, the Cap of Invisibility is a helmet or cap that can turn the wearer invisible, also known as the Cap of Hades or Helm of Hades. Wearers of the cap in Greek myths include Athena, the goddess of wisdom, the messenger god Hermes, and the hero Perseus. Those wearing the Cap become invisible to other supernatural entities, akin to a cloud of mist sometimes used to remain undetectable.
Cellini's Perseus (1545–54), wearing the Cap of Invisibility and carrying the head of Medusa
Hermes is an Olympian deity in ancient Greek religion and mythology considered the herald of the gods. He is also considered the protector of human heralds, travelers, thieves, merchants, and orators. He is able to move quickly and freely between the worlds of the mortal and the divine aided by his winged sandals. Hermes plays the role of the psychopomp or "soul guide"—a conductor of souls into the afterlife.
Hermes Ingenui (Vatican Museums), Roman copy of the second century BC after a Greek original of the 5th century BC. Hermes has a kerykeion (caduceus), kithara, petasos (round hat) and a traveler's cloak.
Archaic bearded Hermes from a herm, early 5th century BC.
Hermes' winged sandals are evident in this Getty Villa copy of a Roman bronze recovered from the Villa of the Papyri, Naples
Statue of Hermes wearing the petasos and a voyager's cloak, and carrying the caduceus and a purse. Roman copy after a Greek original (Vatican Museums).