Robe of the Fire-Rat

The, was a garment woven, as its name suggests, from the fur of the Fire-rat. It is an incredibly tough armor clothing and has regenerative properties. It once belonged to Tōga; however, he gave it to his human wife Izayoi after she gave birth to his half-demon son Inuyasha. It remained in Izayoi's possession until her death, when her son Inuyasha inherited it. Along with a container of rouge that his mother used, which was later shattered by Naraku, the robe was the only thing that he had left of his mother.

Abilities
The robe is completely fireproof. The wearer is protected from both heat and flame. The robe is stronger than any human-made armor, allowing it to shatter un-empowered human weapons, deflect lesser yōkai swords, and absorb concussive pressure from high-powered explosives; the robes have allowed Kagome to survive being immersed in Naraku's highly-corrosive miasma without injury. The robe is regenerative and mends itself, regardless of the severity of the damage (the proof of its regenerative capabilities is how it once completely disintegrated in a cloud of miasma Naraku released, but was back a few days later).

However, as they are derived from a demon, the robe's powers can be nullified by purification barriers, such as the one that once surrounded Mount Hakurei. It becomes a normal robe, and loses its defensive qualities when in such situations (although unlike a living yōkai, it would not be destroyed).

It has some connection with Lake Motosu in that, with four other objects, unseals Princess Kaguya's powers.

Verse
In The Castle Beyond the Looking Glass, when a piece of the robe was tore and stolen by Kagura, Kaguya cited the first part of the verse:

English= The white-hot flame of my love for you cannot burn this cloth of fur. My raiment, sleeves dried of tears, now on this day I don it. Nihongo= 限りなき、思ひに焼けぬ皮衣、袂かはきて、けふこそは着め Rōmaji= Kagiri naki, omoi ni yakenu kawagoromo, tamoto kawakite kyō koso wa kime

When it was thrown into Lake Motosu, this second part was spoken: English= Could you have but known that it would burn so swiftly, this raiment of fur, you would not then have sat with such little show of concern. Nihongo= なごりなく、燃ゆと知りせば皮衣、思ひの外に、置きて見ましを Rōmaji= Nagori naku, moyu to shiri seba kawagoromo, omoi no hoka ni, okite mimashi o

Trivia

 * The Robe of the Fire-rat is based on the one in, which is also fireproof.
 * The Robe of the Fire-rat is a legendary clothing originated in Ancient China.
 * Chinese legends of the fire rat are based on ancient Greek misconceptions of asbestos, a fireproof mineral with hairy fibers that can be spun into a cloth. Some ancient Greek writers believed the moist skin of the salamander, a type of amphibian, could douse flames. This concept was eventually confused with the aforementioned cloth derived from asbestos fibers to form stories of furry, fireproof creatures commonly described as rats.