Lazer Cityzen KinetiCore Helmet Commute with confidence thanks to CityZen's double layer of the new and patented KinetiCore impact protection technology, designed for cyclists who want to feel protected on the city streets. Visibility is upgraded via LED light capability, and Lazer's TurnSys system provides the ultimate tailored fit. FEATURES The Lazer Turnsys system provides a tailored fit that's easy to adjust on the move with a simple turn of the dial Flexible ABS outershell construction made from the same rugged material as used in police riot shields Dual layer KinetiCore technology offers additional protection The front vent and lateral wings of the outer shell are designed to flex and improve protection from rotational and direct impact Increase safety and visibility by attaching the Universal Lazer LED at the rear of the helmet via the Direct Mount 100g less plastics used than in Lazer One+ M CE Weight: 430g (size Medium) SIZES Small 52-56cm Medium 55-59cm Large 58-61cm KinetiCore Ingenuity Built-In. Not Added On. KinetiCore is the result of a decade-long search for a new improved technology. It protects against both direct and rotational impact thanks to unique EPS foam blocks called controlled crumple zones that crumple under impact and absorb the energy that otherwise would have reached the cyclist's brain.