Dragonhide

Dragonhide is a strong, almost unbreakable, yet flexible material used throughout the world. As the name implies, it comes from the tanned hides of dragons, and is very difficult to cut. It can be cut, shaped, or pierced by obsidian and diamond. Dragonhide is typically portrayed as red in color, though it actually retains the color of the dragon, which are often earth-tones, black, green, or grey. The tanning process does not dramatically affect the color of the dragonhide.

Obtaining dragonhide
As the name would imply, the best way to obtain dragonhide is to kill and skin a dragon. Dragons are notorious for being incredibly difficult to kill, however, as many breathe fire. The dragonhide off fire-breathing dragons is typically stronger than that off non-breathing dragons, as the fire-breathing dragons must protect themselves from their own flames. It is advised that, when killing dragons, you hit the dragon in the eye with an obsidian-tipped spear or arrow. If possible, keep the entire corpse, as dragon teeth are useful tools and their bones have many magical and medicinal properties.