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Two headlamp clips at the front and an elastic strap at the back for attaching a headlamp. Magnetic buckle for easy closing of the chin strap. Large ventilation openings for optimal ventilation / adjustment of the straps from the head and chin strap. Weight: 160 g. Headband circumference: 48 58 cm. Hybrid construction with a helmet shell made of EPP foam expanded polypropylene and a hard outer shell with injected EPS foam expanded polystyrene. with a maximum user weight of 165 g sets the Sirocco helmet standards in terms of weight saving. Thanks to the compact design has been the weight reduced to an absolute minimum whilst the mechanical properties of the Expandierten polypropylene EPP is an excellent shock resistance. Also a the webbing adjustment system help of weight savings. Helmet’s Extended coverage around the back of the head has been finished with a new magnetic buckle to the chin strap to be able to close with one hand. The helmet cover of the Sirocco is decorated with several ventilation openings.