Specialized’s wind-tunnel tested 4th Dimension Cooling System – a series of internal channels and exhaust ports that shift air introduced by vents – makes this one of the coolest helmets we've tested.
The soft nylon straps are comfortable but the U-Buckles repeatedly popped open mid-ride.
The Pro Fit 2 harness allows you to adjust the vertical position as well as the volume of the cradle for a perfect, if narrow fit, and a removable peak is perfectly positioned to keep sunoff and vision intact.
With racey looks stolen from big brother 2D, but without a significant weight penalty (thanks to the internal reinforcement skeleton that allows bigger vents and less material), this is one of our favourites.