Hövding Invisible Bicycle Helmet:

The process from design to device took seven years of intensive research and development, recording hundreds of hours of cycling footage and studying accident recreations with the Swedish Stunt Group and crash test dummies. Research has proven that shock absorption from an airbag is actually much greater than that of the polymer foam inside a traditional bicycle helmet. With this research data, Haupt and Alstin were able to acquire the proper government certifications needed to sell bicycle helmets