Lazer's Z1 combines all of the elements of a high-performance helmet and pushes each feature as far as possible. Lightweight, strong and constructed of four in-mold pieces, the Z1 delivers impressive protection along with 31 vents for outstanding airflow. Beyond just light and airy, the internal Rigidity Brace System helps to withstand multiple impacts. Equipped with the Rollsys Retention System, a snug fit is just a quick thumb wheel away. Plus, going aero is simple, as the Z1 is compatible with Lazer's Aeroshell (sold separately).