Island Clouds

Island Clouds (島雲) are a special type of clouds. They are fluffy, but dense enough to carry all kinds of things. They form islands in the sky seas, and first appeared in Chapter 239 and Episode 154.

Island Clouds, as well as Sea Clouds, are created when a compound in Kairoseki called "pyrobloin" is ejected into the air by volcanic eruptions and comes in contact with water vapors. The density of the water vapors determines whether Sea Cloud or Island Cloud will be created. Both these types of clouds are not normally able to survive on the Blue Sea.

At the cloud cutting factories in Skypiea, they are cut and further processed into artificial cloud products, such as Milky Roads and furniture.