A dog named Sky activates the tug sensor on the FIDO vest. The vest is a piece of wearable technology designed to allow working dogs to perform more tasks and communicate more information. Rob Felt/Courtesy of Georgia Tech hide caption

itoggle caption Rob Felt/Courtesy of Georgia Tech

The Navigate Jacket from Wearable Experiments uses GPS navigation and a mapping app on the wearer's smartphone to signal directions. It's part of a new trend of wearable tech that some speculate will be a billion-dollar industry. Rupert Kaldor /Wearable Experiments hide caption

itoggle caption Rupert Kaldor /Wearable Experiments