This sleek silhouette features the adjustability of an In Form fit system, Thermostat Control adjustable venting, and Giro\'s Stack Vent for a fog-free, breathable and comfortable fit.Hard Shell constructionEPS foam liner - for comfort In Form Fit System - for a custom fit in seconds, even with gloves onErgo-friendly dial at the base of the helmet - provides up to 6cm of adjustment and enhanced stabilityVertical tuning - accommodates different goggles and head shapes for a custom fit Thermostat Control adjustable venting - allows you to custom-tune airflow instantly with a simple, low-profile control button on the outside of the helmetGiro\'s Stack Vent - helps keep it clear and fog-freeWomen\'s styling and detailsCompatible with aftermarket Giro audio systems by Outdoor TechSeamless Compatibility with all Giro goggles