A GREAT helmet for what you've paid. I'm 6 feet and ride a triumph tiger 800 with a tall windscreen. Rode with the Krios Pro on highway at speeds of 175kmph and the it just feels light and no buffeting or helmet lift or what so ever. This was a major improvement of what my AGV AX8 Dual EVO couldn't even do. The most at 115kmph the AX8 will throw your head all over the place. My head measures at 58cm and I normally wear a size M (Shoei) but on the Krios I got to wear an L. What I liked: - Its light. - No buffeting/helmet lift even with the helmet lid attached. - magnetic quick-release buckle, - Ventilation: I would rate it 4 over 5. Quite Comparable to the Shoei Neotec.