You’ll never take it off. Experience ultimate comfort with the A3 mountain bike helmet. This premium helmet sets a new standard with luxurious comfort, patent-pending safety innovations, and maximum ventilation for a cool ride even on the longest climbs. The B-Series MIPS Rotational Brain Protection system ensures a 360 degree fit, maximizing the safety features of the A3. It has also received a perfect 5-star rating from Virginia Tech’s helmet safety lab, providing peace of mind in any riding conditions.