Bicycle city helmet. If you enjoy cycling in the city, safety is essential. This helmet provides you with protection while you are cycling in the city. Thanks to IAS and Monomatic system, the bike helmet will fit on every head size. With 24 ventilation openings on the helmet you don't have to worry about overheating and you will have all the comfort you need. Additionally, to improve your comfort while cycling during day or night, reflecting straps and LED light can be found on the helmet. Size: 52-57. Colour: Dark Silver Mat.