"This helmet with strong PC shell and high-density EPS liner to help protect the rider's head from impact and shock. It comes with a detachable visor to provide your face and eyes from sun rays. The 8 vents help improve airflow and the adjustable dial for easy size fit. With a loop holder, you can hang your taillight on it to improve safety. It is a great helmet for cyclist. Features: Strong PC shell with shock-absorption EPS liner. Detachable visor provides shade while riding. 8 vents improve air flow and keep you cool. Moisture-wicking pads keep your head dry. Easy-to-adjust dial fits different head circumference: 54 - 58cm (21.2"" - 22.8""). Tail light holder included. Specifications: Material: PC + EPS Color: Orange / Black (optional) Vent: 8 Density: 85g/L Head Circumference: 54 - 58cm / 21.2 - 22.8in Weight: Approx. 382g / 9.9oz Package Size: 29.5 * 24.2 * 17.5cm / 11.6 * 9.5 * 6.9in Package Weight: 582g / 20.5oz Package List: 1 * Bike Helmet  "