Z1 KinetiCore has been engineered to be both lightweight and allow excellent ventilation, as well as to provide high levels of safety. Strategically placed vents, inclined bridges and a floating headband allow best in class ventilation while keeping aerodynamics in mind. A Lazer Aeroshell can be added to the helmet to close the vents for extra aerodynamic advantage and provide protection against the elements. A Featherweight A 5-STAR Virginia Tech protection rated lid with rotational impact protection built-in weighing in at only 220g M CE Best in-class ventilation Strategically placed vents result in 103.0% cooling efficiency while keeping aerodynamics in mind Eyewear friendly Eyewear can easily be docked in specific slots of the helmet. The shorter head basket ensures a perfect fit of the eyewear temples Floating headband The floating headband aids ventilation, helping you stay cool when you're working up a sweat. It's lightweight and ensures a comfortable fit in the front of the helmet Effortless straps Less materials used, less weight, less plastics. Enjoy a comfortable fit with the antibacterial & recycled stitched straps featuing the Polygiene Biostatic Stay Fresh technology Stay Fresh The Polygiene Biostatic Stay Fresh padding contains aerated holes, which are strategically placed in front of the vents to allow the air to flow through Lazer Aeroshell compatible Pop on the Lazer Aeroshell and protect your head from rain, snow or mud. The Aeroshell can also be used to close the front and side vents for an aerodynamic advantage. The aeroshell comes in S/M/L sizes LED light compatible Increase safety and visibility by attaching the Universal Lazer LED at the rear of the helmet via the Direct Mount Reduced plastics 40g less plastics used than in Lazer Z1 MIPS