Inside Nike’s FuelBand

The band itself is made of a thermoplastic rubber called TPE and polypropelene, a plastic often used in dishwasher-safe food containers. There are 20 LED lights which turn from red to yellow and then green throughout the day — assuming you reach the NikeFuel goal set on your profile. (Nike has software for smartphones and desktop that the FuelBand can be registered with). In addition, another 100 white LED lights reveal time, Fuel points, calories and steps taken — you can cycle through each of