HJC RPHA-10 Speed Machine Jorge Lorenzo Motorcycle Helmet (MC-5, Small) Advanced P.I.M. (premium integrated matrix) a composite of Carbon fiber, Fiberglass epoxy, Aramid epoxy, and Organic fibers resulting in a remarkably strong shell and extremely lightweight Designed for superior fit and comfort using - Max Air-flow top vent - Variable air flow is adjusted by glove-friendly dials on each intake vent ACS Advanced Channeling Ventilation system - Full front to back airflow flushes heat and humidity up and out RapidFire II shield replacement system - Simple and secure shield ratchet system provides ultra-quick, tool-less removal and installation Optically-superior Pinlock prepared 2D flat-racing shield with included clear Pinlock insert - 2-Stage shield closure system with one-touch center locking system makes for an extremely tight and secure seal