Darkness leather[]
Darkness leather is a concept for the drops for the hellbats/stalkers, they are going to be leather counterpart and are a mid duration fuel in nether furnaces.
Darkness armor[]
this type of armor haves the same durability as chainmail-gold armor, this armor can attract mobs, and spawns nether mobs in the overworld (if light level is at 0), useful if you want to farm nether mobs in a controlled ambient.