The Z20 is the result of years spent analyzing how helmets fit, optimizing aerodynamics, reviewing test data, gathering real-world feedback, and applying Bell's cumulative knowledge of impact management. Bell's unique progressive layering energy management system utilizes two separate layers of hard-shelled EPS foam in addition to Integrated MIPS -- enabling them to improve impact performance via multi-density foam and at the same time deliver a more compact overall shape, sleeker design and maximized ventilation. And thanks to a smart combination of the MIPS layer and retention system, the Z20 sets a new standard in fit and comfort. Superb fit is further optimized with the Float Fit Race retention system, featuring height- and width-adjustable cradles and an intuitive, easy-to-use tension dial, and then finished off with our comfortable and sweat-wicking X-Static padding. No matter how long, hot or hard the ride is, the Z20 will ensure that cool heads prevail.