Troxel(R) Spirit Schooling Helmet Tough and practical, engineered for the demands of everyday use. GPS II Dial Fit System provides an adjustable fit, perfect for growing kids and changing hairstyles. Soft-Tip visor adds 30% more sun protection. ASTM F1163-04A/SEI Certified & CE certified to European EN 1384 Standards* * Click on Important Helmet Warning to the right Features: Mesh Covered Vents Durable Upper and Lower Shells Extended Soft-Tip Visor GPSII Dial Fit System Flip-Fold Removable Washable Headliner 14.1 oz. ASTM Approved/SEI Certified Item Specifications: Sizes: Small (fits up to hat size 7) Medium (fits hat size 7 - 7 1/4) Large (fits hat size 7 1/4+)