HJC Marvel Captain Amerika CL-17 Men's Street Bike Motorcycle Helmet - MC-2F X-Large ACS (Advanced Channeling Ventilation System) provides full front to back airflow which flushes heat and humidity up and out SuperCool Interior made from anti-bacterial, moisture wicking fabric Crown and cheek pads are fully removable and washable Pinlock-ready (Pinlock lens insert sold separately) RapidFire Shield Replacement System provides ultra-quick and tool-less removal and installation of the face shield