The Lazer Genesis Cross LTD Helmet gives you two great choices. You can roll stealth in the regular black colorway, or you can attach the limited edition Belgian blue rain/aero cover and represent the Lion of Flanders and that country's colorway. Because the helmet is Lazer, though, it's sure to include their patented Rollsys fit system with vertically adjustable head basket, a rigidity brace system that offers superior resistance to impacts, as well as 19 vents for airflow. This helmet works with optional Lazer taillights, and it is also designed to work with Aeroshell, Insect Mesh, Cappuccino Lock, and Lazer Magneto eyewear attachments. Winter pads are also included with your purchase. Lazer Genesis Cross LTD Helmet Specifications: DOT certified: NoGender/Age: UnisexHelmet style: Road PerformanceMIPS: NoMulti Impact: NoVisor Included: NoWeight: 338 grams (large) , 309 grams (medium) Size Chart Helmet Size (IN) Medium Large Head Circumference 21.7 - 23.3"" 22.8 - 24""