Explanation:Product Details:1. Shell: ABS plastic.2. Surface: Bright paint, matte paint.3. Lenses: Double lenses, internal brown short lenses, external transparent long lenses, all with anti-fog effect.4. Size: Release you; Head size: 56-62cm, single upper weight 1.1kg.Features:-Four seasons ventilation, double mirror design, external lens is high -definition and wear resistance and prevent inner lens car lights and sunlight.-The upper window and tail air outlet design improves air circulation and keeps the interior comfortably.-ABS Anti-Fall helmet body, three times the hardness upgrade.-The efficiency can be completely removed and washed, both of them can be worn.-Multiple colors and multiple options.Including package:1*Security helmet