Polar's next fitness wearable is a smart shirt
 

In the good old days, the best way to get accurate body readings was to strap on a chest-worn heart-rate monitor and go out for a run. But companies like OMSignal and Hexoskin, among others, changed this by developing monitors that could be embedded...

https://www.engadget.com/2017/01/03/...rt-shirt-game/