Dear Marbess, the invisible bicycle helmet is intended for persons who want to wear no normal bicycle helmet. ...because they think that they are then no more so beautiful. :-)
Because I am not beautiful, however, also without bicycle helmet, I can continue wearing a normal bicycle helmet :o))
Here you see 2 videos of crash tests with the invisible bicycle helmet:
At the decorated bicycles were aerial balloons fastened... and most participants of the parade were dressed up like for a carnival procession... as a knight... as a Santa Claus... as a Kasper...
On the way were some tasks to master... cycling through obstacles... climb up steep ramps...
...and a Russian Nieuwjaarsduik! ...but without topless bikini :o))