The Leo Cloth is one of the 12 Gold Cloths worn by the most powerful of Athena's Saints. Covering the most of the Saint's body, it has the most resistance to damage and freezes at -273.15 degress, the Absolute Zero according to Camus.
This is the Cloth originally worn by Aioria, the guardian of the House of Leo. Draped around its shoulders is a white fabric cape.
While fighting in Elysium, Ikki is given Aioria's Leo Gold Cloth to fight with, although it suffers total destruction seconds after.
While Ikki burns his Cosmo while wearing this Cloth, he is surrounded by a golden aura.