A new bicycle helmet that remains "invisible" and does not mess the hair has been developed by two Swedish women.
Hovding, invented by Anna Haupt and Terese Alstin, is designed to inflate in a fraction of a second if you have an accident.
"It became mandatory for children to wear a helmet in Sweden and many people didn't use them," ABC News quoted Haupt as saying.
"We found out people wanted something that was almost invisible that didn't destroy their hair or annoy them, something with the possibility to change the looks of the helmet like they can with mobile phone shells and wigs," she said.
The Hovding looks like a collar at first, worn around the neck. Inside it is an air bag, similar to the ones in your car.
According to the company's website, shaped like a hood, the air bag is triggered when sensors - a combination of accelerometers and gyroscopes, pick up "abnormal movements of a bicyclist in an accident".
The air bag can inflate and surround your head in 0.1 seconds. A small gas inflator fills it with helium. It needs to be powered on for which there is a power button and when it's on, LEDs light up to tell you how much electricity you have to work the inflator.
There is also a sound to tell you it is powered on in case you cannot see it around your neck. That means you also have to charge the invisible helmet. It uses a microUSB port and the company says a charge lasts about a month during normal use.
The helmet also has a "black box", similar to ones on airplanes, to record the movements of the cyclist, and recognize the acceleration and angular velocity during an accident.
The data is stored in the Hovding so the company can then see what sort of accident it was.
As with any wearable gadget, the women put effort into the design.
It is obviously more invisible than current helmets, and there's an added bit to make it blend in even more. The collar has a removable liner so you can change it to match your shirt.
The company claims its invention is even safer.
"This helmet is so much better than others; the airbag and the helium gas is much softer inside than a traditional helmet," Haupt said.
According to her, 20 people have been in real accidents with the helmet on in Sweden and other European countries, and it has worked perfectly.