The NuMetrex Heart Sensing bra was quite a hit when it launched 2 years ago, but now the company has used the same technology in a top that leaves a bit more to the imagination.

The Racer Tank has the same special electronic sensing technology integrated directly in to its fabric as the bra which monitors your heart rate.

The top comes with a little transmitter which then sends data to a compatible heart rate monitor wrist watch, a cardio machine or other monitoring device.

The Tank comes in coral, white and black and it is made of quick drying nylon Lycra with a second-skin fit.

So we suggest you should get a pretty good workout just getting into the top.