human
How to fit a bike helmet properly?
assistant
1. Position the helmet squarely on your head, with the front edge no more than two finger widths above your eyebrows.
2. Fasten the chin strap and adjust its fit so that it is comfortably snug against your chin and cheeks.
3. Buckle the chin strap and, if necessary, tighten the adjustment slider for a snug fit.
4. Put your hands on each side of the helmet and gently rotate it front to back and side to side to ensure your skin moves with it.
5. Pull the straps out from the sides and adjust the slider for a proper fit.
6. Make sure the straps form a "V" shape that is centered just below the ear.
7. Adjust the buckle of the chin strap so that it is snug around the throat.
8. Finally, test your helmet fit by shaking your head vigorously up and down and side to side.