Uncomfortable
This has the exact problem I was trying to avoid with an inflatable support - it is too fat when the air is out. My seat has some lumbar and when this is deflated it's obnoxious poking in my back. I need more support at times, mostly on long drives, and want it to be comfortable otherwise. I was hoping for a reasonably benign pad when deflated, then I add as needed. Also the pad is too short, it doesn't go across my whole back. So I have this uneven thing sticking in the middle of my back. It does push out nicely when inflated which I would love, but even then it's uncomfortable because it's just in the center of my back. It does not feel like the seat is pushing out more, it's obviously something poking out. Return and keep  looking.
Rating: 2 stars