The Cygnus Bronze Cloth is a cloth given to Hyoga by Aquarius Camus, who trained him in Siberia. It is of the lowest class of the cloths that Athena’s Saints wield, the Bronze Cloths.
According to one myth, after the loss of Eurydice and his eventual death, Orpheus was turned into a swan, and placed in the sky along with his Lyre, both as constellations.
The Cygnus Bronze Cloth was kept frozen in the Permanent Glacial Ridge of East Siberia. It was an icy mountainous area unfrozen for thousands of years, implying the cloth hadn’t be used in a long period. According to Hyoga’s master, Aquarius Camus, despite its home being the Permanent Glacial Ridge, the Cygnus Bronze Cloth’s freezing point had never exceeded the regular Bronze Cloth level of -150 C.