Multiposition articulating optically true injected polycarbonate visor duly silicon hard coated for scratch resistance properties Outer Shell injected from special high impact grade of engineering thermoplastic All STUDDS Models come in one standard size (58-60cms) which generally fits all Quick release chinstrap mechanism for ease of operation & safety High quality U.V. resistant Polyurethane paints used for aesthetic enhancement Regulated density EPS concussion padding lined with specially treated anti allergic velveteen Dynamic Ventilation system for increased air flow providing more comfort to the rider while driving Certification: ISI Certified Helmet Type - Full Face