I have had Bell helmets in the past and one actually probably saved my life in a Motorcycle accident 42 yrs ago. This is my 1st Full face so it's a little strange to me. When I measured I did it 5X's as I couldn't believe I wore a medium, but i went with it and sure enough it's correct. Feels a little snug but it's supposed to and I've only had it a few days so it will loosen up some too. I give it a high rating in durability because of my past experience with Bell. Looks great, has good air flow, and good visibility. Awesome price for a quality helmet!