Minecraft wiki entry for Transportation_methods, associated text: The Elytra are late-game items found in the End that can be equipped in the chest piece slot. While falling, the player can double-tap the jump button to activate the elytra, allowing the player to gradually glide long distances. This by itself is a powerful transportation method, but the player can enhance their flying with the use of firework rockets to propel themselves in any direction, allowing for extended flight time. However, the player must take note of the elytra's durability, which gradually decreases while flying (The Unbreaking enchantment can be added to slow this effect, and Mending can be added to exchange gathered XP for durability). Phantom membranes can be used to repair elytra in an anvil if necessary. Having a sustainable amount of firework rockets is also fairly expensive if the player does not have a mob farm to easily produce gunpowder. There is also the possibility of the player dying of fall damage if the elytra's durability runs out, or from smacking into a surface at high speeds.