HJC Sparteon Adult RPHA 10 Pro Street Bike Motorcycle Helmet - MC1 / Large 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 which is extremely lightweight 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 Optically superior fog resistant clear Pinlock prepared 2D flat-racing shield comes complete with a clear Pinlock insert 2015 Model