ROCKBROS Universal Fit Light-Up Bike Helmet - Ride and Be Seen! Perfect for the average cyclist that races, commutes or simply rides for recreation. Integrated visor provides sun protection. 24 large vents allow for massive amounts of air to flow through the helmet, keeping you cool and comfortable. A precise fit is achieved with our universal dial fit system and comfortable and secure adjustable nylon chinstrap. Equipped with a front light and 2 side lights in this helmet helps be safe at night. Additionally, the helmet has a built-in rear LED light that helps the traffic behind you know that you are there. The rear LED light offer 3 modes to choose from (constant, flashing and chasing). Great for biking/cycling, rollerskating, rollerblading, skateboard, BMX, MTB/ Mountain Bikes, electric bikes or scooters. Overall, the ROCKBROS "light-up" helmet offers superb protection in a lightweight, attractive and yet, affordable design.