Specifications:- Construction: Hybrid Shell + MAP- Ventilation: MarkAIR Channel System, 2 Position Climate Control- Protection: 360° Edge Protection, 270° MAP Protection PadsFitting: - RTS Fit System- Xdry Performance Lining- Fidlock OG Snap- Earpads: Removable & Audio Ready- Goggle: Clip Stretch Clip- Circumference (cm): 55-59 - Weight (+/-5%): 510 g