●Integrated in-mold PC shell with EPS Foam extends down the sides and back of the head maximum protection and durability.Only weight 310g ,wont weigh you down while you biking. ●Complies with U.S. Consumer Product Safety Commission Safety Standard for Bicycle Helmets for Persons Age 5 and Older ●Features a removable visor which can be detached and reattached in seconds – ideal for both mountain biking and road biking. ●Built-in action camera mount,allows you record your entire ride while you focus on the joys of riding. ●15 large vents for cool on challenging and prolonged rides, along with a comfortable chin pad to prevent chafing ●Adjustable in sizes from 55-61 cm (21.6-24 inch) and suitable for most of youths and adults , with quick and easy adjustments