Material: Integrated PC shell, effective impact resistance, wear-resistance and drop resistance. Thickened EPS liner with cushioning effect.. Adjustable elastic buckle: One button disassembly and thick nylon head rope, simple operation and more solid for a perfect fit.. Specification:Product name: Muti-sport helmetMaterial: PC shell, EPS linerNumber of ventilation holes: 12Applicable scene: Road bikes, MTB, eletric bikes, scooters , etc. Package Included:Helmet * 1. Note : This helmet don't includes any warning light.