The Cloths are several sets of armor said to protect the Saints' bodies. Athena's Saints wear Cloths which varies between Bronze, Silver and Gold. The Bronze Cloths covers the least of the Saint's body, the Silver Cloths offers more protection of the body, while the Gold Cloths offers the best protection.
However, if the Saint wearing the Cloth fails to awaken the Cosmo inside his own body, the Cloth simply becomes a heavy piece of armor without any useful qualities.
In the era of Omega, all the Cloths receive new appearances and further upgrades in strength due to the elements added to them after a large comet of darknes crashed down to earth and clashed against Athena's Cosmo of light.