Anna Haupt and Terese Alstinat created the first "invisible" bicycle helmet. According to
TechCrunch, "The invisible bicycle helmet uses rechargeable battery-powered accelerometers and gyroscopes that detect the typical motions involved in a bike crash. They trigger a tiny gas inflator which instantly fills a nylon airbag with helium. The bag forms a hood around your head that cushions the impact of the street, a car, or anything else you slam into."
The product and company, named Hövding, began as the industrial design master’s thesis of the Swedish duo. Their motivation to revolutionize the bicycle helmet stems from their dislike of current helmet appearance and complaints over how uncomfortable they are. The inflatable helmet only works once and has a $600 price tag. Will you be next in line to purchase one of the cranial airbags?
nitrogen (non-flammable) would do fine.
Agree it's volatile to containment and $$
Their chose through, I didn’t invent the God Damn thing.
And I know it only shows if it opens, but I can envision it opening, a lot, by mistake pretty easily.