Outer shell material: HD polypropylene inner shell: HD expanded polystyrene front band: soft nylon PA universal sizes from 51 to 62 cm Weight 420 g Standard EN 12492 Category II operating temperature -20 °C / 95 -0 ° C GRIANTI-INTRUSION METAL GRILL that prevents debris from entering the helmet while maintaining breathability. Ventilation helmet designed with 10 ventilation slots that maximize the internal airflow through the outlet channels, giving high breathability. Helmet designed with attachment points for applying the visor to the helmet. Requires visor screw set. INTEGRATED LAMP CLIP Designed with 4 nylon clips for lamp application. Compatible with KASK headlamps with elastic bands. UP & DOWN ADJUSTMENT Three integrated components for all-day comfort. The new double diameter wheel allows for even easier adjustment, while the side flaps ensure a simple and secure fit. 2DRY PADDING Technical fabric dries fast and accelerates the dispersion of sweat and moisture towards the surface for maximum comfort and feeling of freshness. ASCO RING Strap with ring for attaching the helmet. Designed to allow secure attachment of the helmet to harness or other equipment. Attachment points for anti-noise headphones adaptor. Integrated preparation that allows the application of bayonet adapters for KASK headphones and headphones on helmets of the Superplasma series.