Bell: FLAT OUT FASTBuilt with the same core design principles as the pro-level Zephyr, the all-new Stratus road helmet combines lightweight aero effciency with cutting-edge comfort technologies. The shape was refined for all round road performance-ventilated for long climbs but still fast for the flats-and the all-new Float Fit system offers comfort and security with a streamlined fit and an oversized dial that's easy to adjust with one hand. The Overbrow Ventilation system pulls cool air in through the front and pushes it through an air-channel matrix to reduce overheating. And thanks to the adjustable No-Twist Tri-Glides, the straps stay flat and properly positioned no matter how hard you're hammering. This model also includes MIPS (Multi-Directional Impact Protection System) for added protection in certain types of impacts.WEIGHT:295 gramsVENTS:18CERTIFICATIONS:CPSC Bicycle, CE EN1078VENTILATION:Overbrow Ventilation™CONSTRUCTION:Fusion In-mold Polycarbonate ShellLightweight Internal Polycarbonate Roll CageFIT SYSTEM:Float Fit™OTHER TECHNOLOGIES:No-Twist Tri-Glides™Lightweight StrapsReflective Decals (select colours)MIPS®