Rather flimsy, but do help.
These are cheaper, both in price and quality, to the "Sea Bands" I had purchased at a pharmacy. They DID seem to help my friend's nausea somewhat, but the "button" came out of one of them as soon as she put it on her small wrist. I would recommend getting better quality ones at a pharmacy. I wear mine whenever I fly and have never gotten air sick since (ALWAYS before!).
Rating: 2 stars