This helmet fits perfect , and at speed over one hundred it's pretty dam good as in aerodynamic ! It doesn't feel like it's gonna fly off your head or it doesnt feel like it gonna pull your head off ! I ordered a small , but after I ordered it I realized I needed a medium after I got it I tried it it didn't fit , no problem at all they took it back and sent me another of the right size totally painless ! The helmet is great and so is MOTOSPORT I will definitely be making another order soon !!!