Oakley’s MOD3 helmet is full of tech features. The Modular Brim System allows the wearer to choose the aesthetic of their helmet while ensuring excellent compatibility with goggles. Boa sizing adjustment maximises the fit and comfort. In-mould construction keeps the weight down and active vents enable the airflow to be controlled with ease.Size GuideSmallMediumLarge51-55cm55-59cm59-63cmClick here for more information on our Size & Fit GuideVenting: ActiveSizing System: AdjustableWeight: 460gConstruction: In-MouldSafety standard: eN 1077 Class B, ASTM F 2040 VentingAdjustable active ventilation enables hot air to rapidly escape out the top of the helmet. If conditions turn, close the venting to keep your head warm and dry.Brim/goggle ventilation allows hot air to flow unobstructed from the goggle through the brim ventilation for better anti-fog performance.Sizing SystemThe Boa 360o fit system is engineered to deliver full wraparound comfort and fit by simply twisting the dial at the rear of the helmet.ConstructionIn-mould helmet construction uses a tough polycarbonate outer shell which is moulded to the helmet\'s impact-absorbing ePS foam liner. This construction makes for a lightweight and low profile helmet.