The N100-5 is Nolan's successor to the N104 and is their top of the range flip-front helmet. The outer shell is made from Lexan, a polycarbonate resin thermoplastic with superior impact strength which is used in bullet-resistant 'glass'! The new N100-5 Classic shell is more compact than its predecessor the N104 with better aerodynamics and a lower weight. The Nolan N100-5 Classic N-Com is a dual homologated motorbike helmet, meaning you can ride with the helmet in either open or closed position. When it is in the open position the clever design ensures that the snug fitting chin bar hugs the outer shell for less drag and wind resistance. Nolan's exclusive Air-Booster technology system with two large intake vents forcing cool air into the most critical areas and two exhaust vents to dispel the warm moist air ensures the optimal ventilation. Internally, the inner impact absorption EPS liner is fixed to the outer shell, improving safety and eliminating that creaking sound often heard with modular helmets. The large viewport has a scratch resistant visor for increased peripheral vison, an anti-fog Pinlock insert and the internal drop-down sun visor has an automatic retraction system. The improved, larger, chin curtain and adjustable neck roll keep out wind and road noise for improved comfort. The retention strap has the patented Microlock2 system; a double lever retention system with micrometric adjustment which prevents unintentional or accidental opening of the chinstrap.