Giro Jackson MIPS Helmet - Men 's: The modern profile of the Jackson (TM) MIPS helmet is realized through the Passive Aggressive Venting system - a design inspired by the aerodynamic airflow lines of high-end auto design. The discrete, yet powerful system effectively manages airflow and temperature while in-motion or standing static. The overall look is finished with a slight brim and subtle lines for style and Seamless Compatibility with all Giro goggles. The Jackson MIPS also features MIPS technology, a lightweight construction, and the dialed in fit via the In Form (TM) 2 Fit System. All these components work together to allow you to confidently focus on the terrain ahead. The mountains are calling, head down the line in style. CONSTRUCTION MIPS (R) - Multi-Directional Impact Protection System In-Mold Construction FIT SYSTEM In Form (TM) 2 Fit System On-the-Fly Vertical Tuning VENTILATION Passive Aggressive Venting System Stack Vent FEATURES TPU Injected Brim Polartec (R) Power Grid (TM) padding Removable goggle retainer Removable ear pads Compatible with aftermarket Giro audio systems by Outdoor Tech Seamless Compatibility with all Giro goggles Compliance: CE EN1077 SIZES S: 52-55.5cm M: 55.5-59cm L: 59-62.5cm XL: 62.5-65cm Giro Jackson MIPS Helmet Mens | Matte Black | Large | Christy Sports