Features: Shell: Polycarbonate, with a protective lacquer against UV rays. Inner lining: Anti-allergenic, antibacterial lining that comes out completely and washes. Ventilation: Anti-fog at the front and channels in the shell for better air circulation inside, with a system for pushing the hot air out. Visor: Scratch-resistant. An internal tinted visor that closes inside the shell Fastening: Micrometric, ratchet type, for a correct fit and easy opening. Specification: ECE 22.05P