DESC: Giro Stylus offers serious performance with a relaxed attitude, featuring a compact shape, an amazing fit and great ventilation. In-mold technology fuses the liner with the microshell to create a true exo-skeleton for a lighter weight and more durable helmet. Acu-Dial fit system offers single-handed fit adjustment, plus variable fit anchor points and height adjustment for a truly custom fit and feel. A generous 26 vents keep you cool.