vliegraces werx r helm hi vis groenblauw koolstof xl 73 9223xAIS Adaptive Impact Systemrheon Impact Energy Cells Which Maximize Absorption of Low Speed Linear and Rotational Impacts, Reducing Forces Transmitted to the Brain12K Carbon Fiber Shell Produces An Extremely Lightweight Shell With Superior Penetration Resistance Resistance Resistan Impact ForceSExpanded Volume EPS Strategic Areas of the Helmet Have More Impact Absorbing Eps, More Suspension Between Your Head and the Groundtrue Functional Ventilation