The C4 Pro has a DFP (Direct Fiber Processing) fiberglass outer shell and has been thoroughly tested in SCHUBERTH's own wind tunnel. Including Pinlock® 120 anti-fog visor. Polycarbonate visor with optical visibility class 1, quickly interchangeable through the Quick-Release System. Integrated zone visor made of polycarbonate, anti-scratch, 80% tinted. + -85dB at 100 km / h on a naked motorcycle. Seamless inner lining provides extra comfort and creates no annoying pressure points. Prepared for wearing (sun) glasses. The complex Multi-Channel ventilation system provides the necessary ventilation in the helmet. Equipped with an integrated antenna, two speakers and a microphone as standard to install the optionally available SC1 / SC2 communication system. Micro Lock quick release, adjustable on both sides of the chin strap. ECE-R 22.05 approved.