Albie, i have the accuband, it works by applying pressure to that particular pressure point. You can also find that pp in a pinch by going to your wrist, and finding the spot 3 finger lengths above it, Then apply firm pressure for a minute at a time on this spot. If you're starting to feel funny, sometimes working this pressure point will help you from going over the edge. I don't usually get sick on trips, but on offshore trips when the waves are 7 and 8 footers, it has helped.