The Lazer Z1 MIPS Helmet is designed to deliver optimal pro performance, where light weight, total adjustability, excellent ventilation, and comfort are stressed during design and testing. Hours of research, development, and racing experience produced the Lazer Z1 helmet, defined as professional-grade equipment and appreciated by many. The Z1 is the lightest helmet Lazer ever made without sacrificing style, safety or comfort. Additionally the MIPS system adds an additional safety aspect by introducing a low friction layer into the helmet. This layer can move relative to the helmet helping to absorb the rotational forces in case of a crash. This does not interfere with the existing protective capabilities of the helmet, it just adds to them. Lazer's innovative ARS retention system which surrounds the head comfortably, adjusts via a smooth thumb wheel on top of the helmet, so you can easily control the fit during riding. 31 vents ensure optimal airflow keeping you cool, while the in-mold construction provides full protection. 225 grams. SM (52-56cm), MD (55-59cm), LG (58-61cm).