Outer shell in painted ABS, Inner shell in EPS, Chinstrap in hypoallergenic and waterproof ECO-leather with bayonet buckle, 5 chinstrap attachment points for better stability on the head, Chinstrap color: BLACK / BLUE / BROWN, Inner padding/liner in eco-friendly fabric with Sanitized treatment, removable and washable in cold water or machine washable at 30°C, Flexible painted nylon visor, independently interchangeable (standard, polo, and jockey versions), Front air intake grid and rear ventilation holes for optimal airflow, NFC chip for first aid data registration, Cotton Kep helmet bag included, Helmet weight: • Size M: 560 ± 50 g • Size L: 600 ± 50 g, Certifications and standards: • CE EN1384:2023 • ASTM F1183-23 SEI certified, 100% Made in Italy. PLEASE EMAIL US YOUR LINER SIZE 52CM TO 58CM