HELMET SIZING Recommended Age: 14+ Recommended Size: 22" - 24.5" Stay Cool & Protected! Featuring 21 open air cooling vents, an adjustable dial fit system, a built-in sun shield visor, and a light, it delivers all-day comfort and coverage. The integrated nylon retention strap ensures a secure and stable ride. KEY FEATURES: Adjustable Dial for a Personalized Fit Integrated Nylon Retention Strap 21 Open Air Cooling Vents Built-In Sun Shield Visor Integrated Light Sleek Grey Finish for Style & Visibility