Features1Integrally-molded construction with ABS hard shell and EPS foam provides ultimate impact resistance and conservation. 2Removable transparent goggles provide wide field of view and allow you to wear your glasses under the goggles. 3Air vents on the front and back enhance air flow and breathability, keeping you cool and comfortable. 4Adjustable dial system provides a customized fit for 56 - 61cm (22\" - 24\") head circumference. 5Soft, breathable lining pad is removable for easy washing.SpecificationThis helmet is made with impact-resistant ABS shell and shock-absorption EPS foam to provide ultimate conservation. It is necessary protective gear for Cycle. Features:Integrally-molded construction with ABS hard shell and EPS foam provides ultimate impact resistance and conservation. 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 HelmetPackage List1 * Bike Helmet