Wearable technology is poised for rapid growth over the next few years. Bracelets currently dominate the market due to their fitness and medical applications. Smartwatches are also growing as they allow information to be displayed without taking out a smartphone. Google Glass represents an ambitious augmented reality product but eyewear adoption faces challenges. Overall, the wearables market is estimated to grow from 14 million devices in 2011 to over 300 million by 2018.