Using CAD technology, the HJC CL-Max II Modular is made from an advanced Polycarbonate composite shell that makes this motorcycle helmet lightweight and comfortable with a superior fit. Full front to back airflow flushes heat and humidity up and out. The CL-Max II uses a single-button chinbar release for easy opening. Whether itas for a quick ride across town or a road trip across the country, the HJC CL-Max II Full-Face Modular Motorcycle Helmet is a great choice. Ready for Bluetooth Communication (Bluetooth unit sold separately) . Advanced Polycarbonate Composite Shell with Adjustable Polycarbonate Chinbar: Lightweight, superior fit and comfort using advanced CAD technology. Single-button Chinbar/Faceshield Release: Open with one hand even with gloves on . Optically Superior Faceshield: 95% UV protection. QuickSlide Shield Replacement System (HJ-17 Shield) : Quick, secure, tool-less removal and installation. aACSa Advanced Channeling Ventilation System: Full front to back airflow flushes heat and humidity up and out. Bioceramic NylexA Moisture-wicking Interior: Anti-bacterial, removable and washable. DOT approved. Note: Lower and lock before you leave: Never ride with the chinbar in the raised position. For proper fit and size measure the circumference of your head 1 above your eyebrows and around the largest portion of the back of your head.