This helmet is made with impact-resistant ABS shell and shock-absorption EPS foam to provide ultimate protection. It is necessary protective gear for cycling. Features: Integrally-molded construction with ABS hard shell and EPS foam provides ultimate impact resistance and protection. Removable transparent goggles provide wide field of view and allow you to wear your glasses under the goggles. Air vents on the front and back enhance air flow and breathability, keeping you cool and comfortable. Adjustable dial system provides a customized fit for 56 - 61cm (22" - 24") head circumference. Soft, breathable lining pad is removable for easy washing. Specifications: Material: ABS + EPS Color: Black / White (optional) Vents: 4 vents Size: Approx. 28 * 23 * 17cm / 11 * 9 * 6.7in Head Circumference: 56 - 61cm / 22 - 24in (L) Weight: 514g / 1.1lb Package Size: 28.5 * 23.6 * 19cm / 11.2 * 9.3 * 7.5in Package Weight: 701g / 1.5lb Package List: 1 * Bike Helmet