It was a stand alone sci fi book, and in it there were helmets..? that stored information. I'm pretty sure it was set in a post apocalyptic future and it had old technology like hover crafts. There are are group of “heroes” looking for a lost helmet and they’re racing to find it before another group of people.
I know it’s a weird tidbit but the hovercrafts had shock-absorbing foam and the hovercrafts had trouble crossing rough terrain.