So comfortable you wont ever want to take it off. The A3 Bicycle helmet is a new standard in premium Bicycle helmets with luxurious comfort, patent-pending innovations in coverage, ventilation that will you keep you cool on the longest climbs with comfort and coverage on the sketchiest of descents. B-Series MIPS creates an optimal 360-degree fit that can maximize the features built into the A3. TLD Sweat Glide System, carefully designed EVA wicking foam behind the comfort liner along the brow, directs sweat away from eyes and optics. - TOP OF THE LINE most comfortable helmet weve made to date w 3-Way Magnajust visor, comfort liner - CUTTING EDGE COVERAGE Tech with MIPS, industry first EPP (high speed), EPS (low speed) coverage - 16 VENTS FOR MAXIMUM AIRFLOW- the most intake and exhaust vents of any half shell helmet weve made - Troy Lee Designs: 40 years of racing for the Worlds Fastest Racers. Corona, California