HJC Solid Men's CS-R2 On-Road Motorcycle Helmet - Matte Black/X-Large Advanced aerodynamic polycarbonate composite sculptured shell Lightweight superior fit & comfort using advanced CAD technology ACS advanced channeling ventilation system. Full front to back airflow flushes heat and humidity up & out Optically superior anti-scratch face shield. Hard coated 3D shield design anti-scratch coating RapidFire HJ-09 shield replacement system. Quick, secure, tool-less removal and installation. Proven reliability and easy to use system