Healthcare&WellnessSports&FitnessTechnologyTrendsWT | Member The Smart Hats By My Nguyen - 22. August 2016 While most activity trackers come in the form of wristbands or smartwatches, there are also activity tracker devices that sit on your head like a normal hat. They are smart […] To access this page, watch the live stream and videos on-demand, you must purchase the Free Subscription, Premium Subscription or Premium Subscription (6 months, special rate).