This is the back stretching air cushion that inflates to your preferred level of firmness for customized support and relief of back pain. The air cushion is placed against the small of the back and its integrated hand pump and pressure gauge allow you to inflate the unit to a desired level, providing a controlled, gradual stretch that loosens and soothes tight back muscles and spinal discs. The lumbar stretcher restores healthy curvature of the spine and maintains disc space between vertebrae, helping relieve lower back pain. The unit can be used while you are lying down or placed against a chair's backrest to reduce strain on spinal discs and nerves during long periods of sitting. The entire unit stores unobtrusively inside a purse or suitcase for convenient travel. 10" L x 5" W. (1 lb.)