Wearable technology devices that can be worn by consumers include smartwatches, fitness trackers, smart glasses, and more. Google Glass is an augmented reality smart glasses developed by Google that displays information hands-free via voice commands. The Air Umbrella concept replaces the plastic umbrella top with a windshield and uses air to mimic a standard canopy. The Lark sleep sensor tracks sleep patterns and quality through a wristband and app, using gentle vibrations as an alarm to avoid stress responses. Key challenges for wearable devices include short battery life, large size, poor aesthetics turning off consumers, and the need to demonstrate clear value beyond smartphones.