Details The Smith Mission MIPS Helmet - Where classic styling meets everlasting value, the Mission brings the proven fit and function of Smith helmets to an audience who will never again call this piece of gear just a helmet. A lightweight construction, adjustable dial fit system, and AirEvac™ ventilation means you can ride comfortably from first chair to last, no matter what the conditions. Construction Lightweight in-mold construction Aerocore construction featuring Koroyd®: Smith's objective and design philosophy behind Aerocore™ construction is to increase airflow, improve temperature regulation resulting in fog-free vision and improve impact resistance. The objective was achieved through the combination of materials such as EPS and Koroyd®, a revolutionary new material that absorbs more energy upon impact when compared to international standards, while increasing airflow. Aerocore™ construction through the use of Koroyd® and EPS allows for more vents to be placed throughout the helmet without sacrificing protection and comfort. Fit Adjustable dial fit system Ventilation Regulator adjustable climate control 14 vents AirEvac™ ventilation Details Snapfit SL2 earpads Lifetime Warranty Certification: ASTM F 2040, CE EN 1077:2007 CLASS B, CPSC, CE EN1078 Helmet Size S = 51-55cm M = 55-59cm L = 59-63cm Weight 16.0oz/400g (Size M) Smith Mission MIPS Helmet