I actually take my Fitbit Flex off when I'm writing (typing) for extending periods of time on my Macbook Air. The edge of the Macbook presses into the rubber at

I actually take my Fitbit Flex off when I'm writing (typing) for extending periods of time on my Macbook Air. The edge of the Macbook presses into the rubber at just the right angle and annoys me enough I have to remove it. I don't know how this isn't more of a problem for all wrist-wearables, honestly.