Features:High quality material: This bike helmets is made of high quality material, which is resistant to fall, not easy to break, strong and durable.Comfortable and breathable: 20 holes ventilation system to enhance the air-circulation inside the helmets, distributed mesh lining, more comfortable to wear.Front and rear light design:The bike helmets uses rechargeable LED front and rear lights, the front light can glowing the front and the tail light can let others identify your direction, there are 4 light modes which can be easily and freely switched, providing maximum visibility and safety when riding at night.WIDE APPLICATION:This adult outdoor cycling helmets can fit all sizes of heads.GREAT GIFT: This bike helmets is a great gift for cyclists on Christmas/Halloween/Thanksgiving/Birthday light holidays.Notice:1.Actual color may be slightly different from the image due to different light effect2.Please allow 1-3cm deviation due to manual measurementDescription:Material: PC shellSize: L:57-61cm/M:54-57cm