Construction In-mold - EPS liner / polycarbonate shell. Fit system Author DialFit. Ventilation 17 vents. Antibacterial replaceable pads. Weight 244g (incl. visor).durable In-Mold construction and a removable visor, to recreational riders. Fit adjustments are fast and easy to use it, 17 big vents pull in cool fresh air to enhance comfort in almost any conditions.