Lazer Century bicycle helmet The Lazer Century bicycle helmet is the result of 100 years of expertise. By combining knowledge and user requirements, the Century offers a new standard for the level of protection, comfort, aerodynamics and visibility. The Twistcap technology in the helmet ensures that you can change your helmet from a fully ventilated helmet to an aerodynamic helmet in no time. The Twistcap allows you to save watts or increase ventilation by up to 11%. For visibility, the helmet has a rechargeable LED light on the back of the helmet. Furthermore, the Century has internal ventilation channels that actively guide the airflow through the helmet, which contributes to wearing comfort. The helmet also has a new fitting system, so that your helmet always has the best possible fit. Specifications: Colour: Matte Black Gender: Unisex Outer shell material: Plastic Intermediate shell material: Styrofoam Inner shell material: Mesh Fit model: Advanced Turnfit System (ATS) Construction: In-Mold Ventilation: 18 vents & twist cap Integrated LED: Yes (rechargeable) Certification: CE - CPSC - AS Weight: 277 grams (M) Head circumference: 52-56 cm Size: S