Motorcycle helmet with advanced ventilation system-I58Product Features: Provides track grade aerodynamic stability and comprehensive frontal protection. A prominent rear spoiler effectively reduces drag and noise by up to 25% at high speeds. A multi point adjustable aerodynamic ventilation system improves heat dissipation efficiency by 40%. High definition, scratch resistant, large transparent viewing window with double layered thickened lining. Integrated full face protection design, fully compliant