In the battle against the clock, Giro's Selector is your latest and greatest weapon. The secret is in the tail which can be customized for the rider's anatomy, riding position, or even the course profile to optimize the aerodynamic advantage. Put on the Tall option for riders with a compact or hunched profile, or the Shallow tail if you have a flatter back profile. This speedy lid is also loaded with features like Giro's In-Mold polycarbonate shell for durability and low weight, their Roc Loc TT fit system for a custom fit, a vented windshield to protect your eyes and increase the aero advantage, and Giro's antimicrobial X-Static padding for awesome comfort. Add it all up and you've got an exceptionally high quality and well-fitted helmet built for going screaming fast.