Description: 4 layers of protection. The helmet body is made of strong and durable ABS material, painted with healthy and environmentally friendly materials, the impact cushioning layer and the sweetenable hollow ring design have a small protective effect against accidental collisions and are long lasting and not easily damaged. Enjoy travelling: the skeleton liner design guards your safety while increasing air circulation, light and not stuffy Sun protection: the extended lens design reduces the sun\'s damage to the face improving the shading effect. The streamlined aesthetic design of the tail enhances your style while improving your safety quality Specifications: Product Type: Half Helmet Shell material: ABS Weight: 600g Size: 26*22*16cm Head circumference: 54-62cm (adjustable size of liner) Package Included: 1*Safety helmet