HELMET SIZING Recommended Age: 14+ Recommended Size: 22" - 24.5" Ideal For Everyday Riding & Commuting! Ride with confidence in the Capstone(TM) Adult Helmet, designed for safety, comfort, and airflow. Its lightweight in-mold construction pairs with 10 open air vents to keep you cool, while the adjustable dial and integrated nylon retention strap ensure a secure, custom fit. KEY FEATURES: Lightweight In-Mold Design Adjustable Dial for Custom Fit Integrated Nylon Retention Strap for Added Stability 10 Open Air Cooling Vents