All motorcycle helmets are donned the same way: You pull them over your head, then buckle it tight with a chinstrap. But French motorcycle helmet manufacturer Roof has a different idea. They've recently unveiled this Djagger prototype, which makes the donning experience more like putting on a mask than a hat:

No idea how the thing works, but as you can see there are cables involved:
The company says their occipital opening system offers a range of UX benefits: "No more uncomfortable fitting, no more systematic opening or closing a chinstrap buckle, no need to remove your glasses or your gloves."
Commenters on their Instagram voiced concern about the helmet possibly being difficult for a first responder to remove, in the case of an accident. The company's response:
"Just remove the screws on both sides of the side shell, then the front shell can open by tilting up upwards, then the face and airways of the user are completely exposed while the head and the neck remains stable inside the rear shell. So, the helmet could be opened very quickly without any pressure to the neck of the user!"
Would a first responder know to do that?
The Djagger appears to be headed for production, though the company hadn't released details at press time.
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Comments
I would like to know two things about this. Firstly, how much extra weight does the system add. Generally, less weight on the end of your neck is better in an crash. Secondly, what safety certification it has earned.
What are the real benefits compared with a helmet with a front face opening (which have additional qualities)? I can use mine without removing my glasses and with gloves..