The Sagittarius Cloth is one of the 12 Gold Cloths worn by the most powerful of Athena's Saints. Covering the most of the body, they have the most resistance to damage and freezes at -273.15 degress, the Absolute Zero according to Camus.
Originally the Cloth of the deceased Gold Saint Aioros, this is the Cloth that has always aided Seiya when his Bronze Cloth is insufficient.
It covers most of the wearer's body, with golden wings at his back. An ordinary headgear protects the forehead and a large waist to cover the lower parts of his body.
While wearing this Cloth, Seiya is surrounded by a golden aura when he burns his Cosmo.
But in spite of all those times the Gold Cloth has aided him, it has never truly been his own Cloth.