Head of the class, A3 leaves nothing to chance by setting the modern standard in protection and fit as demanded by Troy Lee Designs' athletes. Equipped with Mips® protection, the co-molded EPP/EPS design features sixteen vents to optimize airflow making for a helmet that is so comfortable it practically disappears on your head. This helmet is designed and intended exclusively for use by bicycling activities, including mountain biking and off-road cycling. - Co-molded EPP and EPS - Mips® B-Series Rotational Impact Brain Protection System - Advanced layering 3-piece shell - 3-Way Magnajust® visor - Sweat Glide System - EVA wicking foam - 2-piece Ionic® comfort liner - 16 vents optimally tuned with the channeling of the helmet - Premium 3D Fidlock® magnetic buckle system - Composite smart shear screws - 415G