The large fit my head
The large fit my head perfectly. The helmet has great airflow, and I'm happy with how easily the chin guard is to remove and replace. I love the styling of the helmet and appreciate the included go pro mount that came attached to the top of the helmet. It fits snugly, and the adjustment wheel on the back of the helmet gets the fit just right. If I had to say anything negative about the helmet, I'd say the helmet has a way of deciding how you glasses will sit on your face that could have been avoided by providing a wider channel for the arms to sit in. I've been able to mitigate the glasses problem by making adjustments to how the helmet sits on my head. I'm not sure what that visor is supposed to do since it sits on top of the helmet, but it's not a knock against it, maybe it's doing something and I just don't know it yet as it's been mostly cloudy in the few weeks I've had the helmet. Overall I'm extremely satisfied with my purchase, and hope to never have to rely on the functionality of this helmet.