Find your size: Measure the circumference of your head 2cm above your eyebrows (about the width of a finger). Once you have your head circumference, use our size guide to select the correct size based on the model helmet you are interested in. If you are between sizes, we recommend that you select the smaller size helmet Guaranteed Comfort: “Uni Size” design with single shell size and wide range of fit system adjustment makes for quick, confident sizing with comfortable fit Integrated Visor: Designed to help block the sun and keep rain and low-hanging branches out of your face, without rattling or sagging Eyewear-Friendly: Designed with eyewear in mind, so you can stash your shades in the helmet securely without the temple arms causing discomfort against your scalp Light It Up: The LED-compatible design makes it easy to attach the Universal Lazer LED light at the back of the helmet for enhanced visibility Your riding covers a wide range. Whether you chase twisty, hidden singletrack or a well-worn path at the edge of town, the Lupo KinetiCore’s stealthy design and advanced 5-star protective capability keep you cool, comfortable and focused on the ride.