You know the one. Someone offers you a bulky orange life jacket and you politely decline it. I can swim, you think, and besides, you'd look ridiculous. But in the USA alone, 83 percent of the people who drowned in 2013 were not wearing it, and as many as 370,000 people drown in the world every year! Handy wearable device Kingii aims to reduce this bleak statistic by reinventing lifelines. It is a wrist device that uses a CO2 bomb. In case of danger, it inflates a hidden cushion that keeps a person afloat for up to 48 hours.
