Unparalleled dampingThe outer shell, made of absorbent polymer, absorbs a first part of the shock by deforming.The 2nd layer takes up the energy of the impact and absorbs it.The 3rd shell, made of fibreglass, ensures the rigidity of the entire helmet to avert lateral compression.The 4th layer is the polystyrene shell which completes the deceleration of the shock by crumpling under the impact, thus protecting the cranial vault from brain injuries.An optimal ventilation systemThanks to its numerous front and side vents and its rear outlets, this helmet provides maximum ventilation.Unparalleled comfortThis new one-piece and removable liner can be washed and, if necessary, replaced. The soft and fluffy inner has been given an antibacterial treatment.Better neck protection and increased hold.The classic chinstrap is replaced by a hybrid system, an exclusive from GPA. A cross between the twin lock system and the traditional chinstrap, its rear part is made of thermoplastic resin and incorpor