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.Co-molded EPP and EPS with Mips B-Series rotational impact protectionAdvanced 3-piece shell and 3-Way Magnajust visor for customizable fitSweat Glide System with EVA wicking foam and 2-piece Ionic comfort liner16 optimized vents, Fidlock magnetic buckle, and composite smart shear screws for safety and airflowItem SpecificationsColorElectra BlackDefined ColorBlackGender/AgeAdultHelmet CertificationsComplies with the U.S. CPSC Safety Standard for Bicycle Helmets for Persons Age 5 and OlderHelmet StyleMountainMaximum Head Circumference59Minimum Head Circumference47Multi ImpactYesRotational ProtectionYesSizeMedium/LargeVisor IncludedYes Troy Lee Designs A3 Helmet Helmets UPC: 887202535352