Ride your city bike safely with the Lazer CityZen KinetiCore Zwart S. This bike helmet has KinetiCore fall protection. This makes the chance of serious head injuries in a fall even smaller. You can also attach an LED light to the back of the helmet. This way, other traffic can see you better in the dark. The light isn't included. You'll sweat less thanks to the 4 ventilation openings in the helmet. The openings reduce air resistance and cool your head. Choose this helmet if your head circumference is between 52 and 56 centimeters. You can adjust the size exactly to your head with the dial.