How to choose a bike helmet

A helmet only protects you if it fits and is certified.

Certification

In the US, bike helmets should meet the CPSC safety standard. The listing or label should say so.

Fit

Measure your head circumference above the eyebrows. The helmet should sit level and not rock.

Features

Vents keep you cool; rear lights and visors help commuters.

Replace

Replace a helmet after a crash, even if it looks fine.