I got these to use when I go to the pool. They do work pretty well. The one thing that dawned on me though was if I did faint or anything, while the bands would notify that I have health issues, the first responders wouldn't have specifics and might not know where my things are to find my card. They would be great if you have it combined with the card in your back pocket. I think I'm going to invest in an engraved bracelet down the line.