CES 2015: T-shirt checks your vital statistics

Increasingly our phones are able to monitor our movements and personal health - but what about our clothes?

French company Cityzen Sciences has developed a smart t-shirt, that measures statistics including your heart rate.

The BBC's Leo Kelion caught up with the start-up's Antoine Ormieres at a preview event, to find out why his firm is returning to the Consumer Electronics Show for a second year in a row.

Video footage courtesy of Cityzen Science.