Phantoms can drop 0–1 (or up to 4 with the Looting enchantment) phantom membranes when killed by a player or a tamed wolf. Looting increases the maximum drop amount by 1 per level, for a maximum of 4 with Looting III. Tamed cats also have a 3.22% chance to give phantom membranes to the player as a "morning gift".
Phantom membranes can be used to repair an Elytra by using an anvil restoring 108 durability points (25% of the elytra pair's total durability) per membrane without removing any of the elytra's enchantments.
- Membranes, in reality, are boundary linings that keep organs in organisms in place.