My dad worked in London hospital as a dental surgeon rebuilding jaws for motor bike riders who like the helmets that don't have the extra bit to cover the jaw. He worked there for 3 years while he studied orthodontics and returning to Australia as an orthodontist. He said the average treatment is 6 years so he saw patients start treatment, finish treatment and in the middle of treatment, but he never saw one start and finish.

The helmet Ewn has is that type, I would be happy to use it in a car but not on a motor bike.

Ewn - great photos.