Whether you're mountain biking or trekking, on bike paths, trails or forest roads - this lightweight and stable molded helmet does it all. When you fall, you get double protection with a thin plastic hard shell on the outside and a padded EPS shell on the inside. 19 vents keep your head cool, the 3D IAS size adjustment system allows you to adjust the Uvex active to the exact size and shape of your head. For city rides, you can connect an optional plug-in LED to increase visibility in heavy traffic.