The Lung is a breathing mechanism used by the Xal-Fettk. Although they did not invent it, they have popularized it. Lungs are generally used for breathing underwater, but can be used for breathing in protodemic chutes aswell.
It works by filling an airpouch with super-compact air. A tube runs from the air pouch to the wearers mouth, allowing them to breath. Fully inflated, the Lung is about the size of a Kanoka Disk.