The heat too much for you? What if you had your own personal thermostat?
In September 2017, Embr Labs introduced to the public a product that could do just that. The Wave, which looks like an Apple Watch worn on the inside of the wrist, promised to regulate the wearer's temperature. A button turns it hotter or colder, and when it heats up or cools your inner wrist, you feel as if you turned on a personal thermostat only for you.
Using a UC Berkeley team's research as a starting point, three engineers built a prototype Wave that summer. They tested it on friends, family, and strangers, who came back with unanimous feedback: The gadget made them feel noticeably warmer or cooler.
The Wave doesn't change your core temperature. It's all about perception. Think of holding a hot cup of tea on a cold day or holding a glass of ice-cold water on a hot day. You know you're not doing much to actually heat up or cool down your body, but it makes you feel disproportionately warm or cool all over. That'...