The HJC IS-17 Motorcycle Helmet features an Advanced Polycarbonate Shell which is lightweight, offers a superior fit and comfort using advanced CAD technology, aerodynamic shell with large eye port for greater visibility, One-Touch Integrated SunShield: Smoke-tinted 3-stage adjustable SunShield deploys quickly and easily (Patent Pending) ACS Advanced Channelling Ventilation System: Full front to back airflow flushes heat and humidity up and out, removable, moisture-wicking and odour free interior with advanced anti-bacterial fabric, RapidFire Shield Replacement System: Simple and secure shield ratchet system provides ultra-quick, tool-less removal and installation for efficient operation, Micro Buckle with Retention Strap: Quick-release and adjustable and Pinlock prepared shield and Includes. Pinlock 100% Max vision Anti-fog insert.