Flight Ring(s)

Invented by Brainiac 5 and controlled by will-power, flight rings enable Legionnaires to fly without cumbersome flight belts.
Flight rings also perform communications and security functions.
A special stealth mode allows rings to become invisible when necessary (i.e. when artists forgot to draw them on character 's fingers).
Some flight rings can also be used to travel or communicate through time.
The flight ring has become the most iconic symbol of the Legion.