HJC CL-MAXBT II Bluetooth Modular Motorcycle Helmet (Black, Large) Advanced Injection Molded Lightweight Polycarbonate Shell - Single-Button One Handed Chin Bar/Face Shield Release - Superior Fit and Comfort Using Advanced CAD Technology Bluetooth Ready with integrated recess and interior speaker cavities Optically Superior Faceshield Provides 95 percent U.V. Protection QuickSlide Tool-less Shield Replacement System (HJ-17) ACS Advanced Channeling Ventilation System - Full Front to Back Airflow Flushes Heat and Humidity Up and Out