Some extra “Ring Lore” regarding the Legion of Superheroes and their Flight Rings
via wikipedia
“Engraved with the signature “L” of the Legion of Super-Heroes, this ring enables its wearer the ability to fly in both atmospheric environments and outer space. Legion Flight Rings are composed of the compound known as Valorium. Valorium is derived from Thanagarian Nth Metal, which possesses similar anti-gravity capabilities. Booster Gold is one of the few known non-Legionnaires to use a Legion flight ring. Superman also possesses a flight ring, and keeps it in the Fortress of Solitude as a reminder of his time spent in the 31st century.”