Closely assess the fit. Make sure the helmet comes off level from the forehead, sitting no more than an inch over the eyebrows. It should sit snugly on your head, making contact with your head all around, but it should remain comfortable. Shake your head around and ensure that the helmet remains snug and doesn't flop around. The helmet shouldn't tilt more than an inch in the front or back; try pushing it up from both places to ensure it doesn't. Make adjustments using the control ring and straps if the helmet doesn't fit properly. If you can't get the helmet to fit, try on another model and proceed through the steps again.