Instabeat

Every so often I stumble on something cool and the Instabeat is one of those things. 

A ground breaking swimming monitor mounted on your goggles that tracks, stores, and displays instant feedback of your heart rate to reach your training goals.
Real-time tracking is crucial to achieve your training and fitness goals, but at the same time it shouldn't disturb your head and arm motion during your swim. Instabeat's sleek design reduces friction in the water.
It fits on any pair of swimming goggles

Go read more at Instabeat Indiegogo