Outer Shell injected from special high impact grade of engineering thermoplastic High quality U.V. resistant Polyurethane paints used for aesthetic enhancement All STUDDS Models come in one standard size (58-60cms) which generally fits all 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