Giro Air Attack Shield Helmet FEATURES : Optical shield w/ magnetic attachment (Gray/Silver Flash included. Clear/Silver Flash available), Wind tunnel aided design, Removable X-Static comfort padding, Featherweight webbing with Slimline buckle CONSTRUCTION : In-Mold polycarbonate shell with EPS liner FIT SYSTEM : Roc Loc Air VENTILATION : 6 vents, internal channeling