The Oakley MOD1 MIPS Helmet blends lightweight construction with a low-profile, skate-inspired design. Offering three fit options and featuring the BOA® 360 Fit System for precise adjustability, it ensures comfort and security. MIPS® integration, fixed ventilation, and the seamless Fidlock® buckle provide added safety and convenience for all-mountain adventures. BOA® 360 FIT SYSTEM: A fully adjustable design is engineered to help deliver an exact fit. FIXED VENTILATION: Allows hot air to escape from the top of the helmet. MIPS® INTEGRATION (optional): The MIPS® Brain Protection System is a helmet integrated, low friction layer designed to reduce rotational motion transferred to the brain during an impact. 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. BRIM/GOGGLE VENTILATION: Allows hot air to flow unobstructed from the goggle through the brim ventilation for better anti-fog performance. ADULT: Small (51-55cm) / Medium (55-59cm) / Large (59-61cm) / Extra Large (61-63cm) ASTM F2040 and CE Information provided by manufacturer