This doesn’t even seem real from an idea standpoint… not to mention the picture looks like a bad Photoshop job. Either way it made it into skymall?!
This seemingly useless device goes around your wrist or ankle and informs you (by way of vibrations and a loud alarm) that you’re getting sweaty.
[Source]
It works great to awaken those like me who suffer from nocturnal hypoglycemia. Sweating and/or a drop in skin temp (which this device also detects) are common symptoms of low blood sugar experienced by some insulin dependent diabetics.