The most popular health and personal care item was…

The Fitbit Flex Wireless Activity + Sleep Wristband, a sleep, exercise, and health tracker that straps onto one’s wrist. Amazon sold more Fitbit wristbands this holiday season than it did Philips electronic toothbrushes and Braun electric shavers. The popularity of the little gadget is a pretty clear nod to the growth of the internet of things and growing comfort with mini, wearable computers, as well as the skyrocketing trend in health obsessiveness.