Minecraft wiki entry for Unused_textures, associated text: Leather-chain armor refers to four armor item textures which were found in the initial versions of items.png, alongside the leather armor, chain armor and iron armor sets. First appearing in the second December 31, 2009 build, the sprites technically did see use in-game, but this is of little significance as all sprites on items.png were used at the time, with basically no functionality.