Convert Your Helmet From Vented To Aero With the LAZER CENTURY HELMET you can change from a fully-ventilated helmet to AERO-style in the blink of an eye with the unique Twist Cap and its twist-of-the-hand action. Changing the twist cap in one direction can save you Watts, or provide up to 11% more ventilation when reversed. Integrated LED Rear Lights You'll love the stylish visibility of the integrated (rechargeable) rear LED light sets too as they set a new example in helmet design. The Advanced Turnfit System provides vertical and horizontal adjustment for a perfect fit. Another great feature is the distinctive bottom shell finishing giving the helmet a premium appearance. Internal Vent Channels Actively guiding airflow through the helmet are internal vent channels which add noticeably to your overall comfort. The helmet is also highly compatible with Lazer's VENTO EYEWEAR. In terms of helmet design it's truly hard to beat the LAZER CENTURY HELMET for safety, speed, visibility and style.