Behold The Hövding, Airbag Bicycle Helmet

Behold the Hövding, a discreet airbag that, while not actually invisible, is understated and cool-looking, and which can be worn by cyclists around their necks instead of a helmet. Created by two Swedish university students, the airbag inflates around the cyclist's head in the instances of collision or a fall, protecting them from injuries.
The airbag is shaped like a hood that surrounds your head. The gas inflater that inflates the airbag is placed in a holder in the collar on the bicyclist's back. The airbag is deployed by sensors – accelerometers and gyros – that pick up a bicyclist's abnormal movements in the event of an accident.