Built with the same core design principles as the pro-level Z20, the Stratus combines lightweight aero efficiency with cutting-edge comfort technologies. The shape was refined for all-around road performance - ventilated for long climbs but still fast for the flats - and the integrated 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. Light and fast meets cool comfort for your most heated battles on the road. From long climbs to finishing sprints, Stratus helps you stay at the front of the pack.