Flex 2 is Fitbit's first 'swimproof' fitness tracker

Fitbit said there would be more Fitbits before the end of the year. Now we know there are at least two more.
Today, Fitbit unveiled the new Charge 2 and Flex 2 activity-tracking wristbands, adding incremental updates to the wristbands in a way that strategically differentiates them from the existing Fitbits on the market. All the details about the Charge 2 are here; for more information about the new Flex 2, read on.
The Flex 2 is a slim, simple activity tracker that, like its predeces