Inflatable back pillowInflatable back pillow This outstanding travel aid is far superior to a solid cushion because it adjust to your own shape, providing perfect lumbar support. The jumbo size enhances comfort by better enveloping the lower torso. Direction: The inflating mouthpiece has a special valve to prevent air loss. When inflating, open the mouthpiece by squeezing it with your teeth or fingers. When deflating, squeeze the mouthpiece while flattening the cushion.