Lazer Vento Kineticore Helmet Built for performance The Lazer Vento Kineti Core Helmet is designed for flat-out speed, and unbeatable ventilation all at less weight than previous helmets. This helmet features Lazer's proprietary Kineticore system, designed to reduce forces from rotational impacts at less weight and with less plastic than the competition. The reduced frontal surface area of the Vento is designed with a 15-degree angle in mind, for increased aerodynamic efficiency when you're at your fastest in the sprint position. But the Vento isn't just fast, the advanced ventilation system directs air through the helmet to aid in cooling when you're pushing your hardest. All of this performance and protection is easily adjusted with the Scroll Sys belt, for one-handed fit tweaks to make every ride fast Features Designed for optimal aerodynamics especially when the rider's head is at a 15-degree angle, most common in sprinting and aggressive riding positions Exceptional ventilation with an advanced ventilation system that directs airflow over the rider's head25% lighter than its predecessor, the Bullet 2. 0Lazer's proprietary Kineti Core system with Kineti Core Controlled Crumple Zones to reduce both rotational and linear impact forces, all at a lower weight and using less plastic than competitors Awarded a Virginia Tech 5-Star helmet rating for "Best Available" crash protection based on VT crash testing SPECIFICATIONSCore Material EPS Foam Safety Certifications CPSC, EN1078Buckle Snap Intended Use Road Weight290g (size M)Special Features Compatible with optional Universal Lazer LED tail light Sizing Size Small Medium Large XLHead Circumference (cm)52 - 56cm55 - 59cm58 - 61cm | Lazer | Vento Kineticore Helmet Men's | Size Medium In White