I could also see this being a liability. They will probably need to take steps to mitigate the issue by adding more technology to the wrist band that help moni

I could also see this being a liability. They will probably need to take steps to mitigate the issue by adding more technology to the wrist band that help monitor health in general (health relating to heat exhaustion). This will raise the price of the product, but possibly enable them to do something like send the user (or 911) alerts when your body temperature rises to dangerous levels. In addition to that if they put a disclaimer on the box they can get away with a lot more. Something similar to: http://en.wikipedia.org/wiki/Tobacco_packaging_warning_messages#United_States_of_America http://en.wikipedia.org/wiki/Tobacco_packaging_warning_messa.... This is an obstacle, and how they could go about it in a way that may add to the quality of life, or one where they assume no responsibility for your health if you use this in extreme climates. Also, I'd be interested to see if by "tricking" the body the wearer sweats less and then wouldn't get dehydrated as fast, possibly extending and improving quality of life in extreme climates... I'm far from a doctor, but you are right it needs to be looked into and addressed.