protective helmet
Rigid headgear covering the head to protect it in the event of accident.
visor hinge 
Articulated fastener for raising and lowering the visor.
chin protector 
Part of the bubble protecting the motorcyclist’s chin.
air inlet 
Opening in the bubble allowing air to circulate in the helmet and preventing fog from forming on the visor.
visor 
Transparent swing-away part, protecting the eyes while providing good visibility.
bubble 
Exterior surface made of durable materials (thermoplastic or composite materials) that absorb shocks.