How tight should a bike helmet strap be?

The helmet should sit level on your head and low on your forehead— one or two finger-widths above your eyebrow. Side Straps: Adjust the slider on both straps to form a “V” shape under, and slightly in front of, the ears. … Tighten the strap until it is snug, so that no more than one or two fingers fit under the strap.

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