The integrally helmet has nicer impact resistance and higher strength than the non-integrally helmet. The use of high-grade EPS foam material has fine hardness and density. Features: Fine shock absorption and cushioning performances with a molded PCshell and EPS foam. Disperses impact and effectively protects the heads with 3 layers of protections. Enhanced visibility and safety with reflective strips on the back and sides. Comfortable and easy to cleaning with a thick, soft, and removable inner lining. Stay cool and comfortable with 12 ventilationholes that prevents stuffiness. Adjustable straps and heads circumference for a comfortable and safer wear. Suitable for a wider range of people with a comfortable chin pad and breathable holes that absorb sweat. Specifications: Color: blue, white, silver, black (optional) Size: one-size Material: EPS, PC Heads circumference: 580-620mm Item size: 300 * 190mm / 11.8 * 7.5in Item weight: 306g / 10.8ounce Package size: 300 * 200 * 180mm / 11.8 * 7.9 * 7.1in Package weight: 338g / 11.9ounce Packing List: 1 * Helmet