Tiny changes in skin temperature can affect the how hot or cold your entire body feels.

Four MIT engineering students have developed a thermoelectric bracelet called “Wristify” that directs pulses of hot or cold waveforms at your wrist to help you maintain a comfortable body temperature. The design was even good enough to take home the top prize of $10,000 at MIT’s annual materials engineering competition.

The design is currently a working prototype and would more than likely start its commercial life as a personal comfort device. Its designers have grander ambitions than that however, hoping that it could significantly reduce energy consumption in buildings by cooling the individual, as opposed to the entire structure.

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