||Although this article is based on canonical information, the actual name of this subject is pure conjecture.
Eret's Dragon Scale Armor is a full-body armor worn by Eret during the events of How to Train Your Dragon: The Hidden World.
At some point between How to Train Your Dragon 2 and the third movie (a span of about a year), Eret's armor was constructed.
Eret's dragon scale armor is made out of Skullcrusher's shed scales, which are primarily green with brown trim. The helmet is red and is shaped to resemble Skullcrusher's face.
Because it is constructed from Skullcrusher's scales, Eret's dragon scale armor allows its wearer to be impervious to fire.