So comfortable you won't ever want to take it off. The A3 mountain bike helmet is a new standard in premium mountain bike helmets with luxurious comfort, patent-pending innovations in safety, ventilation that will you keep you cool on the longest climbs with comfort and coverage to protect on the sketchiest of descents. Highest possible score (5-STAR) from Virginia Tech helmet safety lab so you can feel confident in all conditions.Co-molded EPP and EPS.B-Series MIPS Rotational Brain Protection.Advanced layering 3-piece shell.3-Way Magnajust® visor.TLD Sweat Glide System – EVA wicking foam.2-piece Ionic® comfort liner for anti-microbial & sweat wicking.properties that is also quick to dry.16 vents optimally tuned with the channeling of the helmet.Premium 3d Fidlock® magnetic buckle system and composite smart shear screws.Certification - CPSC 1203, CE EN 1078, AS NZ 2063.