1.Lightweight & Durable-In-molding EPS foam core and the PC shell provide good safe performance, engineered to ensure the shock absorption and decrease the impact forces, can better protect the rider's head during crash. This bike helmet is very lightweight, about 210g. 2.LED Taillight-The helmet has the light on the back, which has 3 flashing modes- normal, fast flashing, slow flashing. Having a light on the helmet will make you safer in the night cycling. Press hard on the light, and it will be on; press again to change the modes or turn off the light. 3.Cool Vents-The 19 vents reduce air resistance and enhance the air flow inside the helmet and move airflow over your head to stay cool, greatly enhances comfort. The visor helps shade the sun and shield the rain. It is detachable, two ways to wear. 4.Soft and Comfortable-High-performance pad design for increased comfort, could be removable and come out for easy washing. Soft chin padding protects your chin from discomfort. 5.Easy to Adjust-The dial fit system allows height and circumference adjustments, lets riders easily secure and adjust helmet fit on the head. The chin strap is also adjustable, where you can adjust the length. Package:1pc* Helmet