Size: Global Fit, Size M BOA® 360 Fit System: Designed for a precise fit with a design that allows for fine adjustments. - Fixed Ventilation: Releases hot air from the top of the helmet. - MIPS® Integrated (Optional): The MIPS® Brain Protection System is a low-friction layer integrated into the helmet, designed to reduce rotational motion transferred to the brain during an impact. - FIDLOCK® Buckle: Seamless magnetic function allows you to fasten the helmet even with gloves on. - Removable Liner & Ear Pads: Easy to wash in a washing machine, adapts to a wide range of weather conditions, and easily stores goggle straps under the helmet. - Brim/Goggle Ventilation: Improves anti-fog performance by releasing hot air inside the goggles through the brim ventilation without obstruction. - Adult: Small (51-55cm) / Medium (55-59cm) / Large (59-61cm) / Extra Large (61-63cm)