HJC Helmets RPHA-10 Unisex-Adult Full Face Pro ELSWORTH Street Motorcycle Helmet (Multi, Large) Advanced P.I.M. (Premium Integrated Matrix) Construction "ACS" Advanced Channeling Ventilation System Max Air-flow Top Vent: Variable air flow is adjusted by glove-friendly dials on each intake vent Optically-superior Pin lock-prepared 2D Flat-Racing Shield Innovative Center One-Touch Open/Close Locking System: designed for an extremely secure seal