The Kask Primero Helmet brings you advanced protection against top, front, rear, and side impacts in a comfortable and lightweight package. The chinstrap can be adjusted to accommodate wider heads and adapt to earmuffs, and the Ergo Fit system lets you adjust the helmet quickly with a turn of the knob. The Primero conforms with EN standards for energy absorption capacity and penetration. Lightweight polypropylene HD external shell with optimal impact absorption, even at lower (-30ºC) or upper (+50ºC) temps. Resists yellowing and degradation. HD expanded Polystyrene internal shell for all-around impact energy absorption and maximum comfort. Soft PA nylon Headband. Inner padding with 2DRY liner moisture-wicking fabric technology for all-day comfort and CLICK-IN attachment system that lets padding easily snap in and out. Ergo Fit adjusting system that moves up and down with integrated ergonomic cradle for the back of neck to fit all head sizes 52 to 63cm. Advance Lite Chinstrap with 5 adjustment points for a personalized fit. Ring to hook chinstrap loop that securely attaches helmet to a harness. Easy Click System: Integrated slots for eye and face protection. Adapters required. Standard 30mm Euro slots for attaching KASK earmuffs. 4 removable nylon lamp attachment clips. Color-coded fastener indicates meeting EN compliance standards for protection against top, front, rear and side impacts in conformity with EN 12492: Clause 4.2.1 shock energy absorption capacity Clause 4.2.2 penetration. EN 397 additional tests: 440V a.c. / -30°C / LD / MM, EN 50365 (Class 0) Meets ANSI Z89.1 TYPE I - CLASS E HT LT standards.