All bike helmets are made to meet safety standards in the country of sale and are a recommended piece of kit; if you’re racing, helmets have been required since 2003. Despite cycling helmets being designed for one purpose, there are still a number of design features you need to consider including fit, retention system, ventilation and aerodynamics. Bike helmets consist of an inner shell protected by a hard outer cover. In the event of a crash the EPS shell is designed to break in a controlled way, minimising the impact on your head. Most helmets are designed to be single-impact so it’s essential to replace yours if you do crash.