It DOES self-inflate; it just won't deflate!
Verified Buyer Reviewed by JammaGramma from Iowa on Tuesday, March 8, 2016
I send this pillow back. It seemed comfortable enough. However, I couldn't get the darn thing to deflate. I pressed the air out, then turned the valve, but it keep popping back up. I had my husband (who is an engineer) try, too. He couldn't get it to stay deflated, either. So, it would be fine to keep in the car, but it didn't fit the bill for a deflatable pillow to take on planes.