Big-Mountain brawn, designed for those who demand the highest level of performance, the MOD5 delivers the perfect balance of increased protection and weight savings for technical riding.Oakley Mod 5 Features: Adjustable Ventilation: Allows hot air to rapidly escape out the top of the helmet. If conditions turn, close the venting to keep your head warm and dry.CBOA® 270 FIT SYSTEM: A fully adjustable design is engineered to help deliver an exact fit. FIDLOCK® BUCKLE: Seamless magnetic functionality lets you fasten your helmet with gloves on. Removable Liner/Earpads: Allows for easy cleaning as it is machine washable, adaptable for various weather conditions, and provides freedom to wear the goggle strap underneath the helmet. Modular Brim System: Two interchangeable brims allow for seamless helmet and goggle integration, no matter the size or shape of your favorite goggle. Brim/Goggle Ventilation: Allows hot air to flow unobstructed from the goggle through the brim ventilation for better anti-fog performance. Helmet Travel Bag and Oakley Decal Included Small (51-55cm) / Medium (55-59cm) / Large (59-63cm) ASTM F2040 and CE EN1077 certifications