Ventilation: Internal, recessed channels and manage airflow through the biking helmet and over the head, pulls cool air in through the front and pushes it through an air-channel matrix to reduce overheating.Comfortable : Soft, comfortable, detachable and washable helmet pads. It is specialized designs for the urban commuting, bikes cycling and suitable for city, road, electric, trek bike and etc.Good Helmet: Apply high quality PC shell material and high-density EPS foam for better shock absorption upon initial impact, manages the energy from impacts effectively and offering tremendous protection.Rear Light: Bicycle helmets included plug-in rear LED light provide the highest and best possible protection and visibility on the city streets. And Full in-mold construction and a soft lining ensure that your helmet is comfortable however and wherever you ride.Upgraded Regulator: Intuitive one-handed headmaster fit system adjusts height and circumference. Suitable for most people, the helmet circumference is from 22.44 to 24 Inches (57 - 61cm).